The document discusses various strategies for implementing a new system, including:
- Direct changeover switches off the old system and switches on the new system at a set time, but risks problems if the new system fails.
- Parallel changeover runs the old and new systems simultaneously until the new system is proven, allowing comparisons but using extra resources.
- Phased changeover introduces the new system in stages as each is tested, reducing risk while thoroughly testing parts under real conditions.
- Pilot running tests parts of the new system with real data before full implementation. User training and buy-in is important for successful changeover.
The document discusses system implementation and testing. It describes the implementation phase as developing the new system in the target environment, including training users and preparing for system maintenance. Key steps in implementation involve system construction, installation, and establishing a support plan. Thorough testing is also emphasized, including unit, integration, system, and acceptance testing to ensure quality and identify any issues. Documentation is created to help both programmers and users understand system operation.
The document discusses systems analysis and design. It describes the systems development life cycle as having four phases - planning, analysis, design, and implementation. It then explains six major systems development methodologies: waterfall, parallel development, phased development, prototyping, design prototyping, and agile development. Finally, it lists five common team roles in systems development: business analyst, systems analyst, infrastructure analyst, change management analyst, and project manager.
The document discusses the evolution of management information systems (MIS). It describes how MIS have developed from early office automation systems used to support clerical workers, to modern systems that provide computer-based support for complex decision making. The key components of an information system are outlined as hardware, software, databases, networks, and human resources. Transaction processing systems record daily transactions, while management information systems guide tactical decisions and decision support systems aid strategic decision making by top managers.
Software Engineering Code Of Ethics And Professional PracticeSaqib Raza
This document outlines the Software Engineering Code of Ethics and Professional Practice established jointly by the IEEE Computer Society and the Association for Computing Machinery. The code consists of 8 principles related to a software engineer's responsibilities to the public, clients/employers, products, professional judgment, management, profession, colleagues, and self-development. It provides guidance on ethical issues like ensuring software quality and safety, avoiding conflicts of interest, crediting colleagues' work, and participating in lifelong learning to improve skills. The goal is to establish standards of conduct for software engineers to make the profession beneficial and respected.
The document discusses various system development methodologies: Waterfall, Prototyping, Incremental, Spiral, and Rapid Application Development (RAD). For each methodology, it describes the framework type, basic principles, strengths, weaknesses, and situations where most/least appropriate. The Waterfall methodology is described in the most detail. It emphasizes structured development processes but can be inflexible. Prototyping focuses on iterative development and user involvement. Incremental combines linear and iterative approaches. Spiral emphasizes risk assessment. RAD aims for fast development through iteration and tools.
The document discusses various system development methodologies: Waterfall, Prototyping, Incremental, Spiral, and Rapid Application Development (RAD). For each methodology, it describes the framework type, basic principles, strengths, weaknesses, and situations where most/least appropriate. The Waterfall methodology is described in the most detail. It emphasizes structured development processes but can be inflexible. Prototyping focuses on iterative development and user involvement. Incremental combines linear and iterative approaches. Spiral emphasizes risk assessment. RAD aims for fast delivery through tools, iteration, and user involvement.
This document discusses the key aspects of system implementation including coding, testing, installation strategies, documentation, training, support, and reasons for failure. It covers delivering code, testing plans and results, user guides and training plans. Documentation includes both system and user documentation. Training methods like courses and tutorials are discussed. Support is provided through help desks and information centers. Factors for successful implementation include management support and user involvement.
The document summarizes the systems development life cycle (SDLC) which includes four phases - planning, analysis, design, and implementation. Each phase consists of steps that produce deliverables and moves the system design forward through refinement. Methodologies like waterfall, RAD, agile help structure the SDLC process. Key factors in selecting a methodology include requirements clarity, technology familiarity, system complexity, reliability needs, and time schedules.
The document discusses system implementation and testing. It describes the implementation phase as developing the new system in the target environment, including training users and preparing for system maintenance. Key steps in implementation involve system construction, installation, and establishing a support plan. Thorough testing is also emphasized, including unit, integration, system, and acceptance testing to ensure quality and identify any issues. Documentation is created to help both programmers and users understand system operation.
The document discusses systems analysis and design. It describes the systems development life cycle as having four phases - planning, analysis, design, and implementation. It then explains six major systems development methodologies: waterfall, parallel development, phased development, prototyping, design prototyping, and agile development. Finally, it lists five common team roles in systems development: business analyst, systems analyst, infrastructure analyst, change management analyst, and project manager.
The document discusses the evolution of management information systems (MIS). It describes how MIS have developed from early office automation systems used to support clerical workers, to modern systems that provide computer-based support for complex decision making. The key components of an information system are outlined as hardware, software, databases, networks, and human resources. Transaction processing systems record daily transactions, while management information systems guide tactical decisions and decision support systems aid strategic decision making by top managers.
Software Engineering Code Of Ethics And Professional PracticeSaqib Raza
This document outlines the Software Engineering Code of Ethics and Professional Practice established jointly by the IEEE Computer Society and the Association for Computing Machinery. The code consists of 8 principles related to a software engineer's responsibilities to the public, clients/employers, products, professional judgment, management, profession, colleagues, and self-development. It provides guidance on ethical issues like ensuring software quality and safety, avoiding conflicts of interest, crediting colleagues' work, and participating in lifelong learning to improve skills. The goal is to establish standards of conduct for software engineers to make the profession beneficial and respected.
The document discusses various system development methodologies: Waterfall, Prototyping, Incremental, Spiral, and Rapid Application Development (RAD). For each methodology, it describes the framework type, basic principles, strengths, weaknesses, and situations where most/least appropriate. The Waterfall methodology is described in the most detail. It emphasizes structured development processes but can be inflexible. Prototyping focuses on iterative development and user involvement. Incremental combines linear and iterative approaches. Spiral emphasizes risk assessment. RAD aims for fast development through iteration and tools.
The document discusses various system development methodologies: Waterfall, Prototyping, Incremental, Spiral, and Rapid Application Development (RAD). For each methodology, it describes the framework type, basic principles, strengths, weaknesses, and situations where most/least appropriate. The Waterfall methodology is described in the most detail. It emphasizes structured development processes but can be inflexible. Prototyping focuses on iterative development and user involvement. Incremental combines linear and iterative approaches. Spiral emphasizes risk assessment. RAD aims for fast delivery through tools, iteration, and user involvement.
This document discusses the key aspects of system implementation including coding, testing, installation strategies, documentation, training, support, and reasons for failure. It covers delivering code, testing plans and results, user guides and training plans. Documentation includes both system and user documentation. Training methods like courses and tutorials are discussed. Support is provided through help desks and information centers. Factors for successful implementation include management support and user involvement.
The document summarizes the systems development life cycle (SDLC) which includes four phases - planning, analysis, design, and implementation. Each phase consists of steps that produce deliverables and moves the system design forward through refinement. Methodologies like waterfall, RAD, agile help structure the SDLC process. Key factors in selecting a methodology include requirements clarity, technology familiarity, system complexity, reliability needs, and time schedules.
This document provides an overview of software maintenance. It discusses that software maintenance is an important phase of the software life cycle that accounts for 40-70% of total costs. Maintenance includes error correction, enhancements, deletions of obsolete capabilities, and optimizations. The document categorizes maintenance into corrective, adaptive, perfective and preventive types. It also discusses the need for maintenance to adapt to changing user requirements and environments. The document describes approaches to software maintenance including program understanding, generating maintenance proposals, accounting for ripple effects, and modified program testing. It discusses challenges like lack of documentation and high staff turnover. The document also introduces concepts of reengineering and reverse engineering to make legacy systems more maintainable.
This document discusses several system development approaches and models, including the waterfall model, incremental model, spiral model, and V-model. It provides details on the key stages and principles of the waterfall model. The incremental model aims to address some limitations of the waterfall model by developing the system incrementally in successive stages with client feedback between each increment. The spiral model incorporates risk analysis into system development through a series of cycles or iterations. The V-model emphasizes the connection between development stages and corresponding testing stages to help ensure quality.
Stepwise Project planning in software developmentProf Ansari
The following activities are:
Identify objectives and practical measures of the effectiveness in meeting those objectives.
Establish a project authority
Stakeholder analysis – identify all stakeholders in the project and their interests
Modify objectives in the light of stakeholder’s analysis
Establish methods of communication with all parties
2.4
The document provides an overview of systems concepts and the system development life cycle (SDLC). It defines a system and lists its key characteristics as organization, interaction, interdependence, integration, and a central objective. The document also describes the elements of a system including inputs, outputs, processors, controls, boundaries/interfaces, environment, and feedback. It then discusses different types of systems and the phases of the SDLC including planning, analysis, design, implementation, and maintenance.
System analysis and design involves developing a complete information system including hardware, software, people, procedures, and data. System analysis is the process of understanding the current system by collecting data, analyzing processes, and identifying problems and improvements. System design develops the new system based on requirements and analysis, proceeding from general design to detailed design. Tools like flowcharts, data flow diagrams, and structured English are used to describe the system design.
UML comenzó a desarrollarse en 1994 como un esfuerzo de unificación de los métodos Booch y OMT por parte de sus creadores Booch, Rumbaugh y Jacobson. La primera versión de UML se publicó en 1995 y desde entonces ha evolucionado para convertirse en un estándar ampliamente utilizado para la modelización de sistemas de software. UML permite especificar visualmente la estructura y el comportamiento de un sistema a través de diagramas de clases, casos de uso y otros elementos.
Chapter 1- INTRODUCTION TO SYSTEM ANALYSIS AND DESIGN by DEEPA (1).pptxanumayived
This document provides an introduction to system analysis and design. It discusses key concepts like information, information systems, and information system components. It also describes different system development methods including structured analysis, object-oriented analysis, and agile/adaptive methods. Additionally, it explains the system development life cycle and provides examples of each phase for a clinic management system project.
Executive information systems (EIS) provide easy access to internal and external information relevant to meeting strategic organizational goals. EIS integrate data from various sources to summarize information executives find useful for decision-making. They allow drilling down from summaries to specific detail levels. EIS components include hardware, software, interfaces, and telecommunications to access distributed data. Advantages include timely delivery of summary information to support strategic decisions, while disadvantages include potential information overload and high implementation costs.
This document discusses software maintenance. It defines software maintenance as the modification of a software product after delivery to correct faults, improve performance, or other attributes. The document outlines the main types of software maintenance as corrective, perfective, adaptive, and preventative. It also discusses the major causes of maintenance problems such as unstructured code and insufficient documentation. Finally, it provides an example breakdown of maintenance activity with perfective maintenance making up 50% of efforts.
The document describes an information management system project created by four students under the guidance of Dr. ------------------------. The project aims to manage student records for the computer engineering department using Python Django and cloud computing. It includes three user interfaces for admins, teachers, and students. The admin interface allows monitoring users and transactions, while the teacher and student interfaces provide performance summaries. The project was completed in December 2021 and deployed to Amazon Web Services. Key technologies used include Python, Django, HTML, CSS, JavaScript, and MySQL.
Introduction to management information systemOnline
The document provides an overview of management information systems and discusses key concepts. It introduces the objectives of studying information systems which include distinguishing data from information and identifying the basic types of business information systems. The document also outlines the lecture which covers information concepts, a business perspective on information, characteristics of valuable information, systems performance standards, manual versus computerized systems, and the positive and negative impacts of information systems.
Your First Step To The Software IndustryAPPSeCONNECT
This document provides information about opportunities in the software industry. It discusses different types of software companies including product and service companies. It then describes various roles within software companies such as development, IT/systems, quality analysis, implementation, marketing, sales, UI-UX design, and others. For each role, it lists the key responsibilities and required skills. The document promotes a specific product company called InSync Solutions and their eCommerce integration product called AppSeConnect. It provides contact information for those interested in learning more about opportunities at InSync Solutions.
The document proposes developing an online records management system for Sultan Kudarat State University (SKSU) to address problems with their current paper-based system. The current system is outdated, time-consuming, disorganized, and risks losing records. The proposed system would consolidate records digitally, allow secure online access from different campuses, and modernize SKSU's records management in line with open governance standards. Developing this system would benefit SKSU and its stakeholders by making records more efficient, cost-effective, and accessible.
An architecture is very complicated and involves three types of decisions: how the system is structured as code units, how it is structured as runtime components and interactions, and how it relates to non-software elements. The document discusses several common architectural structures, including decomposition, uses, layered, class/generalization, process, concurrency, shared data/repository, client-server, deployment, implementation, and work assignment structures. It also discusses Kruchten's four views of logical, process, development, and physical.
Software project planning involves defining roles and responsibilities, ensuring work aligns with business objectives, and checking schedules and requirements feasibility. It requires risk analysis, tracking the project plan, and meeting quality standards. Issues can include unclear requirements, time/budget mismanagement, personnel problems, and lack of management support. Key activities are identifying requirements, estimating costs/risks, preparing a project charter and plan, and commencing the project. The master schedule summarizes deliverables and milestones based on a master project plan and detailed work schedules.
The document defines a system as an orderly grouping of interdependent components linked together according to a plan to achieve a specific objective. It provides examples of computer systems, hotel systems, and business systems. It describes the key elements of a system as including organization, interaction, and interdependence between components, as well as integration and a central objective. Systems have structure and order to help achieve their goals, and components function interdependently, like departments in a business. A system's parts depend on one another, with the output of one subsystem becoming the required input of another to achieve the overall goal of the system.
System design is the process of defining the architecture, components, modules, interfaces, and data for a system to satisfy specified requirements. It involves determining the elements of a system such as its architecture, modules, and components as well as the interfaces and data flows. Systems design takes a systematic approach and considers all related variables to design a coherent system that meets the needs of an organization. One structured methodology is SSADM, which uses logical data modeling, data flow modeling, and entity behavior modeling throughout the system design life cycle from initial design to physical implementation.
A system analyst performs three main roles:
1. They research problems within an organization's existing systems and processes, plan solutions to improve efficiency and productivity, and recommend new hardware and software systems.
2. They act as an agent of change by introducing new IT systems and working to minimize resistance to changes.
3. They investigate issues with current systems, monitor new systems, and gather facts and opinions from users to define requirements and solve problems.
This document discusses software maintenance. It defines software maintenance as modifying software after delivery to correct faults, improve performance, or change attributes. The document then discusses reasons for maintenance like changing requirements or fixing errors. It outlines different maintenance types including corrective, adaptive, perfective and preventive maintenance. The document also examines maintenance models such as quick-fix, iterative enhancement, full-reuse, Boehm's model and Taute's model.
The document discusses the information systems life cycle, which includes stages like feasibility study, requirements analysis, system design, implementation, installation, and maintenance. It describes the waterfall model as a sequential process where each stage must be completed before moving to the next. However, this model does not allow for modifications, so prototyping is introduced as an alternative that can identify issues earlier and result in a more refined final system.
The document discusses the stages of the system development life cycle (SDLC), including feasibility studies, system analysis, systems design, development, implementation, and maintenance. It provides details on the objectives and processes involved in each stage, such as defining requirements, designing system components, acquiring or developing software, testing the system, training users, and periodically evaluating systems once implemented.
This document provides an overview of software maintenance. It discusses that software maintenance is an important phase of the software life cycle that accounts for 40-70% of total costs. Maintenance includes error correction, enhancements, deletions of obsolete capabilities, and optimizations. The document categorizes maintenance into corrective, adaptive, perfective and preventive types. It also discusses the need for maintenance to adapt to changing user requirements and environments. The document describes approaches to software maintenance including program understanding, generating maintenance proposals, accounting for ripple effects, and modified program testing. It discusses challenges like lack of documentation and high staff turnover. The document also introduces concepts of reengineering and reverse engineering to make legacy systems more maintainable.
This document discusses several system development approaches and models, including the waterfall model, incremental model, spiral model, and V-model. It provides details on the key stages and principles of the waterfall model. The incremental model aims to address some limitations of the waterfall model by developing the system incrementally in successive stages with client feedback between each increment. The spiral model incorporates risk analysis into system development through a series of cycles or iterations. The V-model emphasizes the connection between development stages and corresponding testing stages to help ensure quality.
Stepwise Project planning in software developmentProf Ansari
The following activities are:
Identify objectives and practical measures of the effectiveness in meeting those objectives.
Establish a project authority
Stakeholder analysis – identify all stakeholders in the project and their interests
Modify objectives in the light of stakeholder’s analysis
Establish methods of communication with all parties
2.4
The document provides an overview of systems concepts and the system development life cycle (SDLC). It defines a system and lists its key characteristics as organization, interaction, interdependence, integration, and a central objective. The document also describes the elements of a system including inputs, outputs, processors, controls, boundaries/interfaces, environment, and feedback. It then discusses different types of systems and the phases of the SDLC including planning, analysis, design, implementation, and maintenance.
System analysis and design involves developing a complete information system including hardware, software, people, procedures, and data. System analysis is the process of understanding the current system by collecting data, analyzing processes, and identifying problems and improvements. System design develops the new system based on requirements and analysis, proceeding from general design to detailed design. Tools like flowcharts, data flow diagrams, and structured English are used to describe the system design.
UML comenzó a desarrollarse en 1994 como un esfuerzo de unificación de los métodos Booch y OMT por parte de sus creadores Booch, Rumbaugh y Jacobson. La primera versión de UML se publicó en 1995 y desde entonces ha evolucionado para convertirse en un estándar ampliamente utilizado para la modelización de sistemas de software. UML permite especificar visualmente la estructura y el comportamiento de un sistema a través de diagramas de clases, casos de uso y otros elementos.
Chapter 1- INTRODUCTION TO SYSTEM ANALYSIS AND DESIGN by DEEPA (1).pptxanumayived
This document provides an introduction to system analysis and design. It discusses key concepts like information, information systems, and information system components. It also describes different system development methods including structured analysis, object-oriented analysis, and agile/adaptive methods. Additionally, it explains the system development life cycle and provides examples of each phase for a clinic management system project.
Executive information systems (EIS) provide easy access to internal and external information relevant to meeting strategic organizational goals. EIS integrate data from various sources to summarize information executives find useful for decision-making. They allow drilling down from summaries to specific detail levels. EIS components include hardware, software, interfaces, and telecommunications to access distributed data. Advantages include timely delivery of summary information to support strategic decisions, while disadvantages include potential information overload and high implementation costs.
This document discusses software maintenance. It defines software maintenance as the modification of a software product after delivery to correct faults, improve performance, or other attributes. The document outlines the main types of software maintenance as corrective, perfective, adaptive, and preventative. It also discusses the major causes of maintenance problems such as unstructured code and insufficient documentation. Finally, it provides an example breakdown of maintenance activity with perfective maintenance making up 50% of efforts.
The document describes an information management system project created by four students under the guidance of Dr. ------------------------. The project aims to manage student records for the computer engineering department using Python Django and cloud computing. It includes three user interfaces for admins, teachers, and students. The admin interface allows monitoring users and transactions, while the teacher and student interfaces provide performance summaries. The project was completed in December 2021 and deployed to Amazon Web Services. Key technologies used include Python, Django, HTML, CSS, JavaScript, and MySQL.
Introduction to management information systemOnline
The document provides an overview of management information systems and discusses key concepts. It introduces the objectives of studying information systems which include distinguishing data from information and identifying the basic types of business information systems. The document also outlines the lecture which covers information concepts, a business perspective on information, characteristics of valuable information, systems performance standards, manual versus computerized systems, and the positive and negative impacts of information systems.
Your First Step To The Software IndustryAPPSeCONNECT
This document provides information about opportunities in the software industry. It discusses different types of software companies including product and service companies. It then describes various roles within software companies such as development, IT/systems, quality analysis, implementation, marketing, sales, UI-UX design, and others. For each role, it lists the key responsibilities and required skills. The document promotes a specific product company called InSync Solutions and their eCommerce integration product called AppSeConnect. It provides contact information for those interested in learning more about opportunities at InSync Solutions.
The document proposes developing an online records management system for Sultan Kudarat State University (SKSU) to address problems with their current paper-based system. The current system is outdated, time-consuming, disorganized, and risks losing records. The proposed system would consolidate records digitally, allow secure online access from different campuses, and modernize SKSU's records management in line with open governance standards. Developing this system would benefit SKSU and its stakeholders by making records more efficient, cost-effective, and accessible.
An architecture is very complicated and involves three types of decisions: how the system is structured as code units, how it is structured as runtime components and interactions, and how it relates to non-software elements. The document discusses several common architectural structures, including decomposition, uses, layered, class/generalization, process, concurrency, shared data/repository, client-server, deployment, implementation, and work assignment structures. It also discusses Kruchten's four views of logical, process, development, and physical.
Software project planning involves defining roles and responsibilities, ensuring work aligns with business objectives, and checking schedules and requirements feasibility. It requires risk analysis, tracking the project plan, and meeting quality standards. Issues can include unclear requirements, time/budget mismanagement, personnel problems, and lack of management support. Key activities are identifying requirements, estimating costs/risks, preparing a project charter and plan, and commencing the project. The master schedule summarizes deliverables and milestones based on a master project plan and detailed work schedules.
The document defines a system as an orderly grouping of interdependent components linked together according to a plan to achieve a specific objective. It provides examples of computer systems, hotel systems, and business systems. It describes the key elements of a system as including organization, interaction, and interdependence between components, as well as integration and a central objective. Systems have structure and order to help achieve their goals, and components function interdependently, like departments in a business. A system's parts depend on one another, with the output of one subsystem becoming the required input of another to achieve the overall goal of the system.
System design is the process of defining the architecture, components, modules, interfaces, and data for a system to satisfy specified requirements. It involves determining the elements of a system such as its architecture, modules, and components as well as the interfaces and data flows. Systems design takes a systematic approach and considers all related variables to design a coherent system that meets the needs of an organization. One structured methodology is SSADM, which uses logical data modeling, data flow modeling, and entity behavior modeling throughout the system design life cycle from initial design to physical implementation.
A system analyst performs three main roles:
1. They research problems within an organization's existing systems and processes, plan solutions to improve efficiency and productivity, and recommend new hardware and software systems.
2. They act as an agent of change by introducing new IT systems and working to minimize resistance to changes.
3. They investigate issues with current systems, monitor new systems, and gather facts and opinions from users to define requirements and solve problems.
This document discusses software maintenance. It defines software maintenance as modifying software after delivery to correct faults, improve performance, or change attributes. The document then discusses reasons for maintenance like changing requirements or fixing errors. It outlines different maintenance types including corrective, adaptive, perfective and preventive maintenance. The document also examines maintenance models such as quick-fix, iterative enhancement, full-reuse, Boehm's model and Taute's model.
The document discusses the information systems life cycle, which includes stages like feasibility study, requirements analysis, system design, implementation, installation, and maintenance. It describes the waterfall model as a sequential process where each stage must be completed before moving to the next. However, this model does not allow for modifications, so prototyping is introduced as an alternative that can identify issues earlier and result in a more refined final system.
The document discusses the stages of the system development life cycle (SDLC), including feasibility studies, system analysis, systems design, development, implementation, and maintenance. It provides details on the objectives and processes involved in each stage, such as defining requirements, designing system components, acquiring or developing software, testing the system, training users, and periodically evaluating systems once implemented.
The implementation stage delivers the new system to users. It involves major organizational changes and must be carefully planned with training, conversion, and testing. The implementation plan details participant training, the conversion method from old to new systems, and system testing to ensure successful adoption. Training methods depend on user skills and scope of changes, and may involve leaders training others or manuals. Conversion can be direct, parallel, phased, or pilot testing in some areas before full rollout. Testing examines the system under all conditions using various data volumes, simulations, and live data to refine processes over time.
The document discusses the systems development life cycle, which involves feasibility studies, requirements analysis, design, implementation, and maintenance. It describes the traditional waterfall model as a sequential process and notes some limitations. Prototyping is presented as an alternative approach that allows for iterative refinement of requirements and design.
Information System (IS) is a collection of components that work together to provide information to help in the operations and management of an organization.
This document discusses the system lifecycle process, including feasibility studies, requirements analysis, system design, implementation, and maintenance. It describes key aspects of each phase such as analyzing technical, economic, legal and operational feasibility. The system design phase specifies hardware, software, outputs, inputs, and documentation. Implementation involves coding, testing, and converting existing systems. Methods of conversion include direct changeover, parallel conversion, and phased conversion. The document also covers measures of success, causes of failure, and tools for managing successful system implementation both internally and with external user groups.
The document outlines the key stages in the information systems lifecycle:
1) Initiation - where a need for a new system is identified, such as an outdated current system.
2) Analysis - requirements are analyzed through interviews, documentation review, and observation.
3) Design - the system design is created including hardware, software, outputs, and user interface.
4) Implementation - the system is coded, tested, hardware/software is installed, and users are trained.
5) Maintenance - the system is maintained through perfective, adaptive and corrective maintenance.
The information systems lifecycle involves several steps:
1) A feasibility study determines if a new system is technically, economically, and operationally feasible to address issues with the current system.
2) Requirements analysis involves interviewing staff, examining documents, and observing current procedures to understand system needs.
3) System design determines the hardware, software, inputs, outputs, and user interface for the new system.
4) Implementation includes coding, testing, acquiring equipment, installing the new system, training users, and converting data.
This document discusses quality assurance standards for IT systems development and operations. It states that standards provide uniform practices for system development and operation, allowing management and staff to understand requirements and assess quality. The document outlines different types of standards including development controls, performance standards, and operating standards. It notes that standards should be established, enforced as methods change, and audited to ensure documentation provides information to maintenance staff. Benefits of standards include saving time, improved management control, better system design and documentation for training and reducing individual dependence. The document also discusses user documentation contents such as system overviews, running instructions, input/output examples, and error messages.
The document outlines the systems development lifecycle process, which includes analyzing requirements, designing the system, implementing it, and maintaining it over time. Key steps are feasibility studies, requirements analysis through interviews and documentation review, designing hardware/software elements, testing during implementation, and training users on the new system. Conversion methods like direct changeover or parallel runs are used to transition from the old to new system. Ongoing maintenance includes perfective, adaptive, and corrective changes. Prototyping allows detecting issues early and demonstrating feasibility.
Unit testing verifies individual software units are working properly. System testing verifies an integrated system meets requirements. Special system tests include peak load, storage, performance, recovery, procedure, and human factors testing. Conversion methods include parallel systems, direct cutover, pilot systems, and phase-in. Parallel systems run old and new systems simultaneously. Direct cutover replaces the old system with the new system. Pilot and phase-in methods implement the new system gradually. A post-implementation review evaluates accuracy, user satisfaction, reliability, controls, and identifies opportunities after a new system launches.
The document outlines the key steps in creating a functional testing strategy:
1. Understanding system requirements to identify business processes, data, and security needs.
2. Identifying test scenarios to describe specific business processes to test.
3. Defining test objectives to ensure the system's functionality, data accuracy, and security.
This document provides a feasibility report for an online university hostel management system. It discusses the problem definition, proposed solution, functionality requirements, and various feasibility aspects of the project such as technical, economic, and operational feasibility. It also covers requirements analysis, software configuration, system implementation, and provides a conclusion. The key functionality of the system includes modules for administration, hostel management, and students to manage activities like bookings, bills, meal ordering, and notices.
The document discusses different systems development life cycles (SDLC) including the traditional SDLC model and alternatives like prototyping, Rapid Application Development (RAD), and Joint Application Development (JAD). The traditional SDLC model involves phases like requirements definition, feasibility study, systems analysis, systems design, implementation, and maintenance. However, it has some limitations that newer approaches aim to address, focusing more on user involvement, flexibility, and rapid iterations.
Implementation evaluation and maintenance of the misSneha Autade
The document discusses the implementation, evaluation, and maintenance of a management information system (MIS). It outlines four basic methods for implementing an MIS: 1) installing in a new operation, 2) cutting off the old system and installing the new one, 3) cutting over by segments, and 4) operating in parallel and cutting over. It also discusses planning the implementation, which includes establishing relationships and schedules among tasks, acquiring facilities, organizing personnel, developing installation and testing procedures, training operating staff, and testing the system.
This document discusses the system development life cycle (SDLC), which includes several phases: system study, feasibility study, system analysis, system design, coding, testing, implementation, and maintenance. The system analysis phase involves studying the current system and specifying requirements for a new system. This includes collecting data, conducting interviews, and documenting processes. In system design, tools like flowcharts and data flow diagrams are used to design the new system based on requirements. Then coding converts the design into a program. Testing identifies bugs before implementation in the production environment. Maintenance is needed to fix errors and update the system over time.
Software Maintenance with detailed descriptionSaileshSingh27
1. Software maintenance is an ongoing process that consumes 40-70% of development costs and includes fixing errors, improving performance, and adapting to changes.
2. Maintenance is needed to ensure systems continue satisfying user requirements as hardware, software, and needs evolve over time. It accounts for modifying code through corrective, adaptive, perfective, and preventive changes.
3. Reengineering and reverse engineering are processes to understand legacy systems and improve maintainability. They involve analyzing existing code and documentation to recover designs and requirements without changing functionality. This facilitates future maintenance.
Systems Development Lifecycle Walkthrough (Cambridge Technical Level 3 IT)LucySim1
Describing each of the stages of a systems development lifecycle including different examples and comparisons. This was produced for Unit 11 Cambridge Technical Level 3 IT.
The document discusses the systems development lifecycle, which involves analyzing needs for a new system, designing and implementing the system, and then maintaining it. Key stages of the lifecycle include a feasibility study, requirements analysis, system design, implementation, and ongoing maintenance. The waterfall model and prototyping approaches are also covered.
The document presents an overview of the incremental delivery model given by Pankaj Tharau. It discusses that incremental delivery involves breaking a software project into increments and delivering partial functionality to customers in iterations. The highest priority requirements are implemented first. Customers can provide feedback on early increments to refine requirements for later increments. The model has advantages like early value for customers and ability to adapt to changes easily. However, it also has disadvantages like difficulty replacing existing systems and identifying common facilities across increments. The incremental model is suitable when quick delivery is important or new technology is involved.
For admission to Moi University, a student must submit application forms and an admission letter. This includes acceptance letters, details of parents/guardians, residence details, a medical report, original result slips/certificates, and identification documents. The administrator verifies the documents and admits the student if all are authentic. The student makes required fee payments, and the administrator completes the admission process upon receiving the receipts.
The document discusses local purchase orders (LPOs). To obtain an LPO, a purchase requisition form is completed and sent to the procurement department, which then generates the LPO and sends it to the supplier electronically or otherwise. LPOs are used to control the acquisition of goods and services, create budget encumbrances in the general ledger, and allow all parties to track orders by the same number.
The document discusses several topics related to maintaining computer systems. It addresses the importance of documenting maintenance activities, the need to replace aging systems rather than modify them, and some common maintenance problems like dealing with unpredictable changes and using maintenance teams for training. It also covers database backup strategies, recovery techniques for transaction errors or full system failures, reasons for enhancing or replacing existing systems, the need for security against both accidental and deliberate threats, and an IBM study ranking errors and omissions as the largest threats.
The document discusses the digitization of books and the book publishing industry. It covers how technology is enabling the digitization and online selling of books. It defines key terms like digitization, eBooks, and discusses the decisions publishers face when going digital. It also outlines some of the hidden costs of digital publishing like dual production processes and new marketing needs. The document provides examples of devices, platforms, and services involved in digital publishing.
The document discusses several issues facing the book trade industry. It notes that book selling brings together different players and is vital for disseminating information, but that various factors have negatively impacted bookstores. These include the recession, the decline of small independent bookshops, and an "inverted snobbery" regarding books. Meanwhile, large book chains have displaced small sellers. The document also states that books have enabled knowledge transfer and development, but that the book trade industry faces internal issues within a bookseller's control, like marketing and location, and external issues beyond control like political, economic, social and technological changes.
The document discusses the history and development of the book industry and book trade globally and in Kenya. It describes three main structures of the book industry: developed, oriental, and developing. The developed industry, led by countries like the US and UK, controls about 60% of the global market. The developing industry, which includes most of Africa, relies heavily on imports. The document also outlines the book industry in Kenya from the pre-colonial to present day, noting its reliance on imports to meet demand from academic disciplines.
This document discusses data modeling and entity relationship diagrams. It defines key concepts like entities, attributes, and relationships. Entities represent objects of interest like customers, books, or patients. Attributes are data about the entity like a customer's name or address. Relationships show how entities are connected, such as a customer placing multiple orders. Entity relationship diagrams visually map out these entities, attributes, and relationships.
This document contains information about the fifth edition of the book "Let Us C" by Yashavant Kanetkar, including biographical information about the author, acknowledgments of those who helped with the book, and a preface about the changes and focus of the fifth edition. The preface explains that the first 15 chapters focus on basic C programming using Turbo C/C++ for learning, while chapters 16-21 cover more modern Windows and Linux programming. It was updated to keep readers aware of how C is used currently and remove older DOS-centric content.
Kenya has had long term development plans since independence to guide planning and investment. The current plan is Vision 2030, which aims to transform Kenya into a middle-income country by 2030. It has three pillars: economic, social, and political. Progress has been made in achieving the goals under each pillar, such as GDP growth in priority sectors and increased access to education, health care, and water. However, challenges remain like inadequate infrastructure hindering sectors like tourism, and shortages of resources and skilled workers limiting progress. Overall the document analyzes the goals, achievements and ongoing challenges of implementing Kenya's long-term development plan, Vision 2030.
An effective records management program has three key objectives: service, profit/cost-avoidance, and social responsibility. Records management programs help organizations by controlling record growth, reducing operating costs through proper storage and disposal, and improving efficiency by enhancing information retrieval. They also allow organizations to comply with regulations, minimize litigation risks, safeguard vital information, support decision making, preserve institutional memory, and foster a professional work environment. Implementing a records management program can save thousands of dollars annually in storage and staff costs.
An effective records management program has several important business benefits:
1. It controls the creation and growth of records by limiting unnecessary documents and establishing retention schedules to destroy obsolete records. This stabilizes record growth over time.
2. It reduces operating costs by allowing inactive records to be stored off-site more cheaply and freeing up office space. For a typical 30 person office, cost savings could be $7,000 annually.
3. It improves efficiency and productivity by enhancing information retrieval through well-designed filing systems and indexes, allowing staff to access needed information more quickly.
Records management is the systematic control of an organization's records to facilitate efficient operations. It involves creating, organizing, securing, and disposing of records in a manner that allows an organization to document business activities and transactions. Effective records management is important for Moi University to operate efficiently, demonstrate accountability, and comply with legal obligations. However, a study found Moi University's management of electronic records was neglected. Key challenges include a lack of policies and procedures to guide electronic records management, information overload due to more electronic formats, lack of resources and awareness, and decentralization across campuses.
structured programming Introduction to c fundamentalsOMWOMA JACKSON
This document provides an overview of structured programming and programming languages. It discusses the evolution from machine language to assembly language to high-level languages. It defines structured programming as enforcing logical structure and using basic constructs like sequence, selection, and iteration. The document then discusses programming languages in detail, including examples in BASIC and Pascal. It also covers the programming development process, explaining tools like pseudocode, flowcharts, and structure charts for planning solutions before coding.
This chapter discusses how to organize an effective business plan. It recommends including an executive summary, mission statement, marketplace analysis, and operational, financial, and management plans. It also covers different legal forms of businesses like sole proprietorships, partnerships, corporations and LLCs. Finally, it stresses the importance of strategic partnerships to help build market awareness and assist with operations.
This chapter discusses defining an e-business idea. It outlines the entrepreneurial process of assessing one's abilities, evaluating a business commitment, and determining whether to buy or start a new business. The chapter also identifies factors for e-business success such as the network effect, innovative marketing, scalability, and overcoming competitive barriers.
This chapter discusses e-business basics, including how the Internet and World Wide Web have changed business models and the global economy. It explains that e-business encompasses any business conducted over telecommunications networks, and that the Internet and Web have made time, space, and location irrelevant. The chapter also outlines different e-business models like B2C, B2B, and C2C.
1. THE IMPLEMENTATION PROCESS
• The purpose of implementation is to put the
theoretical design into practice. It can involve
the installation of a complete system or the
introduction of a small subsystem . The aim of
this phase is to implement a fully-documented
operational system which meets the original
requirements according to the design given in
the systems design specification
2. Implementation
Implementation involves the following activities:
(a) Writing, documentation and testing of all the
programs required.
(b) Creation of all the master files required in the
system.
(c) Preparation of user and data processing
department operating instructions.
(d) Commissioning of the new system.
(e) Education and training of all staff who will use
the system.
3. Implementation of a Package
• If it is possible to use a package, activity step
(a) will not be required.
• All the other activities, (b) to (e), will have to
be carried out, and it may look as if we are not
saving much effort by choosing a package
4. System Testing
• Integration issues may come up even for a very good
program of system.
• System testing will follow a similar pattern to the
testing of programs. First, simple files will be created
and the sequence of the data flow diagram followed.
The output from each program will be scrutinised to
see that the data has been processed correctly.
• When the programs can pass data reliably between
themselves, then the data is made more complex, until
there is sufficient confidence to use live data.
5. File Conversion/Creation
• When a new system is to be implemented, it is likely that
the master files either do not exist, or, if they do, that they
are not organised as required by the new system. Before
the system becomes operational, the master files must be
created . This can be a major task, and it may involve the
production of a file-conversion system, with its own
programs that will be used only once
• With many systems, it is possible to enter the static data
into the new files over an extended period of time prior to
the changeover to the new system, leaving only the
dynamic data for later entry. For example, product
descriptions, code number, supplier details, etc. could all
be entered into a product file quite a long time before the
stock levels.
• For volatile data, file conversion may be done during a
weekend and data files are frozen thus no transactions
6. Education and Training
• All staff must appreciate the objectives of the
new system, and how it will operate, as well as
the facilities it will provide. Those staff who
prepare data, operate the system and use the
output will require detailed training and practice.
• Special practice sessions must be arranged,
especially where there is a direct changeover,
when there is no "running-in" practice period of
pilot or parallel running.
• Training must also cover the procedures to be
followed when something goes wrong.
7. Implementation Planning
• The successful implementation of any system is based upon the following
points:
• A project control monitoring time, cost and quality of output.
• Managerial commitment and involvement at all levels.
• Analysts who are good communicators and have a thorough knowledge of
the organisation's operations and applications.
• The users' knowledge of and agreement with the system objectives.
• Recognition of user responsibilities in the system development.
• A computer manager capable of getting user support and of instilling
confidence in users.
The planning must be very thorough and include all activities and related
responsibilities to make the new system work and to withdraw the old one
with its documentation. In larger installations a co-ordination committee will
be appointed. Their purpose is to ensure a smooth implementation. The
analyst will be the committee secretary and will have the major responsibility.
A timescale is established and regular progress meetings are held to ensure
the timescale is being kept to.
8. Implementation Personnel
As well as the specialist computing staff responsible for the
implementation of a system, other personnel have an essential
role:
• The business manager and user group, including those
involved in the prototyping, will be brought in to make the
final test.
• The technical manager will assist the users with the
mechanics of actually running the machine(s).
• Hardware representatives will be consulted over problems
and for general advice.
• Consultants will be available for specialist advice on larger
projects.
• The administrative section will be advised of new personnel,
job and responsibility changes and all the necessary clerical
backup; again this is applicable to larger projects.
9. USER INVOLVEMENT
User Involvement in System Testing –
• There is the problem of how staff can carry out normal
duties, while at the same time being concerned with
their new roles.
• User testing and carrying out totally new tasks may
well involve evening and weekend working. Checking
outputs is not a familiar task, and the sheer amount of
work involved may be daunting. Managers may find it
hard to check output which is in an unfamiliar form.
Despite such problems, though, attempts must be
made to carry out tests involving the user as much as
possible.
10. User Involvement in Implementation
In operation of the system, the line management
must know the new duties that their staff will be
required to perform. They have to make sure that:
(a) Input data is being prepared correctly, and on
time.
(b) New reports are being properly used.
(c) Their staff are able to use and understand the
system. During the project development period,
the user management will have a great deal
more work to do in helping with the new
system.
11. CHANGEOVER STRATEGIES
Importance of Successful Changeover
• The changeover implies changes in working practices: from
clerical to computerised, from centralised computing to
distributed computing; from one type of machine to
another; and so on. Staff tend to resent change, and so to
ease the way they must be kept fully informed, and in a
direct manner. Any individuals adversely affected must be
told personally.
• Changeover has to have the support and involvement of
managers and the co-operation of systems staff and users.
• There are two basic methods of changeover – direct and
parallel – and some variations of these.
12. Direct Changeover
• Using direct changeover, at a specified time the old system is switched off
and the new switched on. This is advantageous in that resources are
spared – the method involves the immediate discontinuance of the old
system. However, the new system must have been thoroughly tested so
as to minimise risks in initial operation. Should the new system meet with
unexpected problems – hardware, software, or design – then the old
system may not be able to be retrieved.
As you will realise, this technique is potentially dangerous since it implies
transfer of dependence from a current working system to a new system
which, although tested, has not been used in a real situation. However, there
are several situations where the technique is applicable or unavoidable:
• In very small systems it is often not worthwhile considering any other
technique, owing to the inherent simplicity of the system.
• In very large systems it is sometimes not feasible to maintain two systems
simultaneously (as in parallel and pilot running) owing to the work
involved.
• Where there is little similarity between the old and new systems, the
simultaneous running of both systems may be unhelpful.
• Moist fearsome and some staff may absentee themselves
13. Parallel Changeover
• In parallel changeover the old and new systems are run
with the same data until there is confidence in the new
system, whereupon the old system is dropped.
• Parallel changeover or parallel running of the old and the
new systems simultaneously allows a comparison of output
to be made between them. Any shortcomings of the new
system can be rectified, and continuous cross-checks made.
This is the most common method of changeover, but it is
important to identify objectives, and a timescale must be
established.
• Problem if there is different results and it isnt clear which
system is wrong.
• Not clear when to terminate the old system
• Sometimes there is overuse of staff and other resources to
run two systems
14. Phased Changeover
• Within the two basic methods discussed above we find a number of variations, of
which the most common is phased changeover, where the new system is
introduced in phases or stages as each stage is implemented and operating
correctly. The phases continue until the whole system is in operation. This method
would be used for very large information systems which possess many complex
components and which cross organisational frontiers. The method consists of a
series of direct changes. The implementation of each phase can be controlled, and
risk to the user department is thus reduced considerably.
• This method allows easier transfer of staff and is probably the most satisfactory
method of working, where it is possible. It permits thorough testing under real
conditions while limiting the risk of system failure. It requires, however, that part
of the system functioning can be conveniently separated from the rest. It also
requires some additional clerical effort in handling two different systems
simultaneously. This method is sometimes called 'pilot running' (see later),
although note that pilot running can also be achieved under the parallel running
method.
• The great disadvantage of using any phased or pilot implementation is that users
often have to wait many months, or even years, for a system to be available to
them which completely fulfils their needs. Their needs may well change during the
implementation period, and if their new needs are to be featured in the system,
the final system may never be seen.
15. Pilot Running
• Pilot running is usually used to mean where the
new system is run under controlled conditions
using old data, where a small representative part
of the old system is used as a test area This is a
similar concept to parallel running but is less
disruptive – data from one or more previous
periods is run first on the old system and then on
the new one. Timings are thus less critical,
although realistic timing and data
capture/conversion are not simulated.
16. Changeover Methods Compared(a) Direct Changeover
Advantages:
• This is the simplest method: stop one system, start another. It is usually only undertaken over a weekend or holiday period.
• No extra work in running two systems together for a time.
Disadvantage:
• Very high-risk – if the new system is disastrously wrong, it is difficult to recreate the old system.
(b) Parallel Changeover
Advantages:
• This is a safer method as the old system is kept operational while the new system is brought in.
• Much greater security.
Disadvantages:
• Greater effort is needed to run the two systems and to compare the outputs.
• It may not be very easy to revert to the old system should things go wrong. The new system may handle the information differently, making it
awkward to compare outputs.
• The responsibilities of staff may well change between systems, leading to confusion.
• Knowing when to make the actual changeover. This is usually a compromise between too short a time, keeping costs to a minimum, and too long a
time, allowing for extensive testing.
(c) Phased Changeover
Advantage:
• There is considerable control as only manageable chunks are being changed over at a time.
Disadvantages:
• The system may not easily be split into phases.
• The phases may well be different in the two systems.
• The interfaces between remaining old system phases and the new system
• phases already changed over, are extremely difficult to control.
(d) Pilot running This is often the preferred method.
Advantage:
• Considerable control is retained and no risks are taken even if direct changeover is applied to each area.
• Disadvantages:
• Time is needed to collect and collate the data to be used.
• The two systems may handle the data differently, making comparison of outputs difficult.
17. TRAINING
End-users will expect thorough training as part of their acceptance of the new
system, and it is also in the interests of the organisation that their staff should be
properly trained in its use. There are three aspects to be considered in developing
effective training:
• Who should be trained?
• How should they be trained?
• What levels of training are needed?
• These questions can only be completely answered with a full knowledge of the
system involved. But generally:
• Those who just need knowledge can attend a manufacturer's training school or
attend targeted in-house courses.
• Those requiring a skill can go on specialist training courses, which can be
conducted internally or by the product manufacturer.
The training should be provided in relays, i.e. only so many staff at a time, whilst the
others continue to operate the old system and receive information and instructions
relating to the new system. With careful planning, the training should not create
many problems. At all times, care should be taken with staff problems and worries.