The document discusses several software development life cycle (SDLC) models, including Waterfall, Incremental, Spiral, Evolutionary Prototyping, Agile, and Rapid Application Development (RAD) models. It provides an overview of the key phases and characteristics of each model, as well as their strengths, limitations, and situations where they are best applied. The models differ in their structure, flexibility to change, emphasis on documentation or code, and ability to incorporate customer feedback throughout the development process.
This document discusses different system development life cycle (SDLC) models, including waterfall, V-shape, iterative, spiral, and agile. It provides an overview of the key steps and phases in each model, as well as their pros and cons. When to use each model is also addressed. The agile model and scrum framework are discussed in more detail.
The document discusses several software development life cycle (SDLC) models including waterfall, rapid application development (RAD), incremental, spiral, and agile. The waterfall model is linear and sequential. RAD emphasizes user involvement and time-boxing. The incremental model delivers functionality in phases. The spiral model evaluates risks through prototyping. Agile methods emphasize rapid, iterative delivery through practices like extreme programming (XP).
The document discusses the software development life cycle (SDLC) and its various phases and models. It describes the six main phases of the SDLC as requirements gathering and analysis, design, implementation/coding, testing, deployment, and maintenance. It then explains different SDLC models including waterfall, V-shaped, prototype, spiral, iterative incremental, big bang, and agile. The conclusion states that the best model depends on factors like requirements clarity, complexity, size, cost and skills. The waterfall model is basic but other models are variations that allow for flexibility.
This document discusses different software development lifecycle models, including linear, iterative, agile, and prototyping models. It provides details on traditional waterfall, V-model, incremental/phased development, and iterative/agile approaches. The key strengths and problems of each model are outlined. The document concludes that there is no single model that fits all projects, and the most suitable model depends on factors like requirements stability, architecture, team size, and development objectives for the specific project.
The document discusses the software development lifecycle (SDLC). It defines SDLC as a series of phases that provide a model for developing and managing software applications. The key phases discussed are analysis, construction, testing, release, and maintenance. Within testing, the document emphasizes the importance of using tools like Veracode to test for security vulnerabilities without requiring additional resources. It also covers different SDLC methodologies like waterfall and agile approaches. The conclusion restates that the goal of any SDLC is to deliver high-quality, on-time, cost-effective software that is secure, efficient to maintain and cost-effective to enhance over time.
Lect-4: Software Development Life Cycle Model - SPMMubashir Ali
Ā
This document provides an overview of several software development life cycle (SDLC) models, including Waterfall, V-Shaped, Prototyping, Incremental, Spiral, and Agile models. It describes the key phases and characteristics of each model, and provides guidance on when each model is best applied based on factors like requirements stability, technology maturity, and risk level. The document aims to help readers understand the different SDLC options and choose the model that is most suitable for their specific project needs and context.
The software development life cycle (SDLC) is a framework defining tasks performed at each step in the software development process. SDLC is a structure followed by a development team within the software organization. It consists of a detailed plan describing how to develop, maintain and replace specific software.
The document discusses several software development life cycle (SDLC) models including waterfall, V-shaped, prototyping, incremental, spiral, rapid application development (RAD), dynamic systems development method (DSDM), adaptive software development, and agile methods. It provides an overview of the key characteristics, strengths, weaknesses, and types of projects that each model is best suited for. Tailored SDLC models are recommended to customize processes based on specific project needs and risks.
This document discusses different system development life cycle (SDLC) models, including waterfall, V-shape, iterative, spiral, and agile. It provides an overview of the key steps and phases in each model, as well as their pros and cons. When to use each model is also addressed. The agile model and scrum framework are discussed in more detail.
The document discusses several software development life cycle (SDLC) models including waterfall, rapid application development (RAD), incremental, spiral, and agile. The waterfall model is linear and sequential. RAD emphasizes user involvement and time-boxing. The incremental model delivers functionality in phases. The spiral model evaluates risks through prototyping. Agile methods emphasize rapid, iterative delivery through practices like extreme programming (XP).
The document discusses the software development life cycle (SDLC) and its various phases and models. It describes the six main phases of the SDLC as requirements gathering and analysis, design, implementation/coding, testing, deployment, and maintenance. It then explains different SDLC models including waterfall, V-shaped, prototype, spiral, iterative incremental, big bang, and agile. The conclusion states that the best model depends on factors like requirements clarity, complexity, size, cost and skills. The waterfall model is basic but other models are variations that allow for flexibility.
This document discusses different software development lifecycle models, including linear, iterative, agile, and prototyping models. It provides details on traditional waterfall, V-model, incremental/phased development, and iterative/agile approaches. The key strengths and problems of each model are outlined. The document concludes that there is no single model that fits all projects, and the most suitable model depends on factors like requirements stability, architecture, team size, and development objectives for the specific project.
The document discusses the software development lifecycle (SDLC). It defines SDLC as a series of phases that provide a model for developing and managing software applications. The key phases discussed are analysis, construction, testing, release, and maintenance. Within testing, the document emphasizes the importance of using tools like Veracode to test for security vulnerabilities without requiring additional resources. It also covers different SDLC methodologies like waterfall and agile approaches. The conclusion restates that the goal of any SDLC is to deliver high-quality, on-time, cost-effective software that is secure, efficient to maintain and cost-effective to enhance over time.
Lect-4: Software Development Life Cycle Model - SPMMubashir Ali
Ā
This document provides an overview of several software development life cycle (SDLC) models, including Waterfall, V-Shaped, Prototyping, Incremental, Spiral, and Agile models. It describes the key phases and characteristics of each model, and provides guidance on when each model is best applied based on factors like requirements stability, technology maturity, and risk level. The document aims to help readers understand the different SDLC options and choose the model that is most suitable for their specific project needs and context.
The software development life cycle (SDLC) is a framework defining tasks performed at each step in the software development process. SDLC is a structure followed by a development team within the software organization. It consists of a detailed plan describing how to develop, maintain and replace specific software.
The document discusses several software development life cycle (SDLC) models including waterfall, V-shaped, prototyping, incremental, spiral, rapid application development (RAD), dynamic systems development method (DSDM), adaptive software development, and agile methods. It provides an overview of the key characteristics, strengths, weaknesses, and types of projects that each model is best suited for. Tailored SDLC models are recommended to customize processes based on specific project needs and risks.
The document discusses several software development life cycle (SDLC) models including waterfall, V-shaped, prototyping, rapid application development (RAD), incremental, spiral, and timeboxing. It provides descriptions of each model including typical steps, strengths, weaknesses, and when each model is best suited. It also discusses capability maturity model (CMM) levels and how changing the lifecycle model can impact development speed, quality, visibility, overhead, risk, and customer relations.
SDLC - A framework that describes the activities performed at each stage of a software development project. What is the relationship between SDLC and Quality Assurance? Example of the templates that support
The document discusses software engineering and the software development life cycle (SDLC). It defines key terms like system software, application software, and network-based software. It describes the characteristics of well-engineered software and lists the typical phases in the SDLC: analysis, design, coding, testing, implementation, maintenance, and re-engineering. The advantages of following the SDLC are also highlighted.
This document provides an overview of various software development life cycle (SDLC) models, including Waterfall, V-Shaped, Prototyping, Rapid Application Development (RAD), Incremental, Spiral, and Agile models. For each model, the key steps and processes are described, along with strengths, weaknesses, and scenarios where the model is best applied. Quality assurance practices like defect tracking, unit testing, and technical reviews are also discussed. The document serves as a comprehensive reference guide to the essential information about different SDLC approaches.
The document provides an overview of the Software Development Life Cycle (SDLC) including its various stages and models. The key points are:
1. SDLC is a process that consists of planning, analysis, design, implementation, testing, deployment, and maintenance phases to develop and maintain software.
2. The stages include planning, requirements analysis, design, development, testing, deployment, and maintenance.
3. Common models include waterfall, iterative, spiral, V-model, and agile. Waterfall is the earliest and most basic sequential model while iterative and agile are more flexible to changing requirements.
The document describes the six main phases of the Software Development Life Cycle (SDLC): 1) Planning and Requirement Analysis, 2) Defining Requirements, 3) Designing the product architecture, 4) Building or Developing the Product, 5) Testing the Product, and 6) Deployment in the Market and Maintenance. Each phase is explained in 1-2 sentences with an emphasis on gathering requirements, designing the architecture, coding, testing, and deploying the final product.
The document discusses several software development life cycle (SDLC) models:
- Waterfall model involves sequential phases of requirements, design, implementation, testing and deployment with defined deliverables for each phase. It works well for stable requirements but lacks flexibility.
- V-shaped model emphasizes verification and validation testing in parallel with development phases. It focuses on planning testing in early phases.
- Prototyping model involves building prototypes to clarify requirements with user feedback before final development.
- RAD model focuses on rapid delivery through time-boxed iterations with customer involvement.
- Incremental model prioritizes and implements requirements in groups to provide early functionality.
- Spiral model combines prototyping, risk analysis
The document discusses several software development life cycle (SDLC) models including waterfall, V-shaped, prototyping, rapid application development (RAD), incremental, spiral, and agile models. It provides details on the key steps, strengths, weaknesses, and scenarios for using each model. Quality assurance is important for any SDLC and includes elements like defect tracking, unit testing, code reviews, and integration/system testing.
The document discusses the system development life cycle (SDLC), which includes preliminary investigation, requirements analysis, system design, software development, system testing, and implementation and maintenance. It describes the purpose and history of SDLC as emerging in the 1960s to address the "software crisis". It also outlines the main steps and activities in each phase of the SDLC process.
The document discusses the software development life cycle (SDLC) which consists of 6 phases: requirements gathering, design, development, testing, implementation, and maintenance. It describes each phase in more detail. It then discusses different SDLC models like waterfall, iterative, spiral, and evolutionary process which help implement the phases. The waterfall model follows a sequential process while iterative is more flexible and produces incremental versions. Spiral combines iterative with one SDLC model and considers risks. Evolutionary process resembles iterative but doesn't require a usable product each cycle.
1. Software development life cycle models break down the development process into distinct phases to manage complexity. Common models include waterfall, incremental, evolutionary (like prototyping and spiral), and component-based.
2. The waterfall model follows linear sequential phases from requirements to maintenance. Incremental models iterate through phases. Evolutionary models use prototypes to evolve requirements through customer feedback.
3. The spiral model is an evolutionary model representing phases as loops in a spiral, with risk assessment and reduction at each phase. It aims to minimize risk through iterative development and prototyping.
SDLC - Software Development Life Cycle
and Waterfall Model :
The SDLC aims to produce a high quality software that meets or exceeds customer expectations, reaches completion within times and cost estimates.
This document discusses HMS Eliza's journey to modernize their software development lifecycle (SDLC). They selected Git for source control management and a specific CI/CD tool to enable fast feedback loops and standardized processes. The transition involved migrating from their previous source control (TFS) to Git and establishing a branching strategy. Dependency management was also improved through Nuget. Challenges included transitioning repositories and processes, establishing code ownership, and scaling their Jenkins infrastructure. Next steps involve measuring metrics, adding static analysis tools, and migrating to newer development environments.
The document discusses the Software Development Life Cycle (SDLC), which is a process that consists of detailed planning for developing, maintaining, replacing, and enhancing software within an organization. The SDLC defines a methodology with phases including planning, analysis, design, implementation, and testing/maintenance. The planning phase involves feasibility studies and creating a project plan. The analysis phase breaks down requirements and gathers stakeholder needs. The design phase determines if development is internal or outsourced. The implementation phase builds, tests, and trains users on the new software. Testing and maintenance identifies and fixes bugs while accommodating new requirements.
The document compares various software development life cycle (SDLC) models, including the waterfall model, spiral model, prototype model, and iterative model. It discusses the advantages and limitations of each model. The waterfall model is simple and easy to understand but cannot accommodate changing requirements. The spiral model emphasizes risk analysis but can be costly. The prototype model involves user feedback early but risks wasted time if the prototype is rejected. The iterative model allows for changes between iterations but requires more management attention. In conclusion, the best model depends on the project's characteristics and needs.
The document discusses software development life cycles (SDLC) and three common SDLC models: the waterfall model, spiral model, and agile model. It provides an overview of each model, including their key phases, advantages, and disadvantages. The waterfall model is the oldest and most widely used, following a linear sequence of phases. The spiral model and agile model allow for more flexibility and adaptation during development.
The document discusses several software development life cycle (SDLC) models: Waterfall, V-shaped, structured evolutionary prototyping, rapid application development (RAD), incremental, and spiral. For each model, it describes the key steps, strengths, weaknesses, and scenarios where the model is best applied. The Waterfall model involves sequential phases from requirements to maintenance, while the V-shaped model adds verification and validation phases. Structured evolutionary prototyping uses iterative prototyping for requirements gathering. RAD emphasizes rapid delivery through time-boxing and productivity tools. Incremental development prioritizes requirements delivery in groups. The spiral model incorporates risk analysis, prototyping, and iterative cycles.
The document discusses software development life cycles (SDLC). It describes the typical stages of an SDLC including feasibility study, requirements analysis, system design, development, testing, implementation, and maintenance. Several SDLC models are mentioned, including waterfall, spiral, iterative, prototyping, and RAD (rapid application development). The waterfall model is described as having distinct sequential stages with no overlap between phases. Prototyping and RAD methodologies are also explained in further detail.
The document discusses various software development life cycle (SDLC) models including waterfall, spiral, prototype, RAD, and agile. It provides details on the phases and processes involved in each model as well as their advantages and disadvantages. The document recommends the agile model for ABC Campus given its iterative approach, frequent delivery of working software, and ability to adapt to changing requirements - making it a good fit for the campus' higher education programs and collaboration with the private sector. Reasons for avoiding other models like waterfall, spiral, prototype and RAD are also provided.
Process Model in Software Engineering.pptAtharvaBavge
Ā
Process models provide a structured approach to software engineering by defining key activities and flows. Generic process models include communication, planning, modeling, construction, and deployment activities. Process flows can be linear, iterative, evolutionary, or parallel. Prescriptive models like the waterfall model advocate an orderly approach but lack flexibility for changing requirements. The incremental and spiral models incorporate iteration and prototypes to accommodate change while still providing structure. Evolutionary approaches address changing requirements but require management of project planning and evolution speed.
The document discusses several software development life cycle (SDLC) models including waterfall, V-shaped, prototyping, rapid application development (RAD), incremental, spiral, and timeboxing. It provides descriptions of each model including typical steps, strengths, weaknesses, and when each model is best suited. It also discusses capability maturity model (CMM) levels and how changing the lifecycle model can impact development speed, quality, visibility, overhead, risk, and customer relations.
SDLC - A framework that describes the activities performed at each stage of a software development project. What is the relationship between SDLC and Quality Assurance? Example of the templates that support
The document discusses software engineering and the software development life cycle (SDLC). It defines key terms like system software, application software, and network-based software. It describes the characteristics of well-engineered software and lists the typical phases in the SDLC: analysis, design, coding, testing, implementation, maintenance, and re-engineering. The advantages of following the SDLC are also highlighted.
This document provides an overview of various software development life cycle (SDLC) models, including Waterfall, V-Shaped, Prototyping, Rapid Application Development (RAD), Incremental, Spiral, and Agile models. For each model, the key steps and processes are described, along with strengths, weaknesses, and scenarios where the model is best applied. Quality assurance practices like defect tracking, unit testing, and technical reviews are also discussed. The document serves as a comprehensive reference guide to the essential information about different SDLC approaches.
The document provides an overview of the Software Development Life Cycle (SDLC) including its various stages and models. The key points are:
1. SDLC is a process that consists of planning, analysis, design, implementation, testing, deployment, and maintenance phases to develop and maintain software.
2. The stages include planning, requirements analysis, design, development, testing, deployment, and maintenance.
3. Common models include waterfall, iterative, spiral, V-model, and agile. Waterfall is the earliest and most basic sequential model while iterative and agile are more flexible to changing requirements.
The document describes the six main phases of the Software Development Life Cycle (SDLC): 1) Planning and Requirement Analysis, 2) Defining Requirements, 3) Designing the product architecture, 4) Building or Developing the Product, 5) Testing the Product, and 6) Deployment in the Market and Maintenance. Each phase is explained in 1-2 sentences with an emphasis on gathering requirements, designing the architecture, coding, testing, and deploying the final product.
The document discusses several software development life cycle (SDLC) models:
- Waterfall model involves sequential phases of requirements, design, implementation, testing and deployment with defined deliverables for each phase. It works well for stable requirements but lacks flexibility.
- V-shaped model emphasizes verification and validation testing in parallel with development phases. It focuses on planning testing in early phases.
- Prototyping model involves building prototypes to clarify requirements with user feedback before final development.
- RAD model focuses on rapid delivery through time-boxed iterations with customer involvement.
- Incremental model prioritizes and implements requirements in groups to provide early functionality.
- Spiral model combines prototyping, risk analysis
The document discusses several software development life cycle (SDLC) models including waterfall, V-shaped, prototyping, rapid application development (RAD), incremental, spiral, and agile models. It provides details on the key steps, strengths, weaknesses, and scenarios for using each model. Quality assurance is important for any SDLC and includes elements like defect tracking, unit testing, code reviews, and integration/system testing.
The document discusses the system development life cycle (SDLC), which includes preliminary investigation, requirements analysis, system design, software development, system testing, and implementation and maintenance. It describes the purpose and history of SDLC as emerging in the 1960s to address the "software crisis". It also outlines the main steps and activities in each phase of the SDLC process.
The document discusses the software development life cycle (SDLC) which consists of 6 phases: requirements gathering, design, development, testing, implementation, and maintenance. It describes each phase in more detail. It then discusses different SDLC models like waterfall, iterative, spiral, and evolutionary process which help implement the phases. The waterfall model follows a sequential process while iterative is more flexible and produces incremental versions. Spiral combines iterative with one SDLC model and considers risks. Evolutionary process resembles iterative but doesn't require a usable product each cycle.
1. Software development life cycle models break down the development process into distinct phases to manage complexity. Common models include waterfall, incremental, evolutionary (like prototyping and spiral), and component-based.
2. The waterfall model follows linear sequential phases from requirements to maintenance. Incremental models iterate through phases. Evolutionary models use prototypes to evolve requirements through customer feedback.
3. The spiral model is an evolutionary model representing phases as loops in a spiral, with risk assessment and reduction at each phase. It aims to minimize risk through iterative development and prototyping.
SDLC - Software Development Life Cycle
and Waterfall Model :
The SDLC aims to produce a high quality software that meets or exceeds customer expectations, reaches completion within times and cost estimates.
This document discusses HMS Eliza's journey to modernize their software development lifecycle (SDLC). They selected Git for source control management and a specific CI/CD tool to enable fast feedback loops and standardized processes. The transition involved migrating from their previous source control (TFS) to Git and establishing a branching strategy. Dependency management was also improved through Nuget. Challenges included transitioning repositories and processes, establishing code ownership, and scaling their Jenkins infrastructure. Next steps involve measuring metrics, adding static analysis tools, and migrating to newer development environments.
The document discusses the Software Development Life Cycle (SDLC), which is a process that consists of detailed planning for developing, maintaining, replacing, and enhancing software within an organization. The SDLC defines a methodology with phases including planning, analysis, design, implementation, and testing/maintenance. The planning phase involves feasibility studies and creating a project plan. The analysis phase breaks down requirements and gathers stakeholder needs. The design phase determines if development is internal or outsourced. The implementation phase builds, tests, and trains users on the new software. Testing and maintenance identifies and fixes bugs while accommodating new requirements.
The document compares various software development life cycle (SDLC) models, including the waterfall model, spiral model, prototype model, and iterative model. It discusses the advantages and limitations of each model. The waterfall model is simple and easy to understand but cannot accommodate changing requirements. The spiral model emphasizes risk analysis but can be costly. The prototype model involves user feedback early but risks wasted time if the prototype is rejected. The iterative model allows for changes between iterations but requires more management attention. In conclusion, the best model depends on the project's characteristics and needs.
The document discusses software development life cycles (SDLC) and three common SDLC models: the waterfall model, spiral model, and agile model. It provides an overview of each model, including their key phases, advantages, and disadvantages. The waterfall model is the oldest and most widely used, following a linear sequence of phases. The spiral model and agile model allow for more flexibility and adaptation during development.
The document discusses several software development life cycle (SDLC) models: Waterfall, V-shaped, structured evolutionary prototyping, rapid application development (RAD), incremental, and spiral. For each model, it describes the key steps, strengths, weaknesses, and scenarios where the model is best applied. The Waterfall model involves sequential phases from requirements to maintenance, while the V-shaped model adds verification and validation phases. Structured evolutionary prototyping uses iterative prototyping for requirements gathering. RAD emphasizes rapid delivery through time-boxing and productivity tools. Incremental development prioritizes requirements delivery in groups. The spiral model incorporates risk analysis, prototyping, and iterative cycles.
The document discusses software development life cycles (SDLC). It describes the typical stages of an SDLC including feasibility study, requirements analysis, system design, development, testing, implementation, and maintenance. Several SDLC models are mentioned, including waterfall, spiral, iterative, prototyping, and RAD (rapid application development). The waterfall model is described as having distinct sequential stages with no overlap between phases. Prototyping and RAD methodologies are also explained in further detail.
The document discusses various software development life cycle (SDLC) models including waterfall, spiral, prototype, RAD, and agile. It provides details on the phases and processes involved in each model as well as their advantages and disadvantages. The document recommends the agile model for ABC Campus given its iterative approach, frequent delivery of working software, and ability to adapt to changing requirements - making it a good fit for the campus' higher education programs and collaboration with the private sector. Reasons for avoiding other models like waterfall, spiral, prototype and RAD are also provided.
Process Model in Software Engineering.pptAtharvaBavge
Ā
Process models provide a structured approach to software engineering by defining key activities and flows. Generic process models include communication, planning, modeling, construction, and deployment activities. Process flows can be linear, iterative, evolutionary, or parallel. Prescriptive models like the waterfall model advocate an orderly approach but lack flexibility for changing requirements. The incremental and spiral models incorporate iteration and prototypes to accommodate change while still providing structure. Evolutionary approaches address changing requirements but require management of project planning and evolution speed.
ISTQB - Software development life cycleHoangThiHien1
Ā
The document discusses various software development lifecycle models and when each is best used. It describes the waterfall, V-shaped, incremental, RAD, agile, iterative, spiral and prototype models. For each model, it provides advantages, disadvantages and considerations for when the model should be used. Testing is recommended throughout the development lifecycle, with test activities corresponding to each development phase.
The document discusses several software development life cycle (SDLC) models:
1. The waterfall model involves sequential phases from requirements to maintenance.
2. The spiral model adds risk analysis and prototyping to the waterfall model in iterative cycles.
3. Evolutionary prototyping builds prototypes to refine requirements through user feedback before full development.
4. The incremental model prioritizes requirements and delivers them in groups to provide early functionality.
The document discusses various software development process models:
- Waterfall model is characterized by feedback loops and documentation-driven. It is idealized and doesn't match reality well.
- Rapid prototyping model involves building prototypes during requirements phase for user evaluation and feedback. It allows for flexible design but may continue indefinitely.
- Spiral model is a simplified form of waterfall plus risk analysis. Each phase is preceded by risk analysis and followed by evaluation and planning.
- Incremental model divides the project into builds to slowly add functionality with each release. It delivers portions of product quickly but requires good planning.
- The conclusions state different models have their own strengths and weaknesses. The best approach is to mix and match
Software development life cycle (SDLC) ModelsAOmaAli
Ā
The document discusses various software development life cycle (SDLC) models. It describes the waterfall model process with distinct phases of requirements, design, implementation, testing and maintenance. It also covers the V-model which incorporates testing at each phase. Other models discussed include prototyping, iterative/incremental and when each may be used based on project characteristics and requirements stability.
The document discusses several process models for software development projects, including code and fix, waterfall, incremental/iterative, spiral, rapid application development (RAD), and concurrent development models. Each model has advantages and disadvantages depending on factors like project size, requirements stability, and team expertise. Combinations of models may also be suitable in some cases.
The document describes the waterfall model of software development. It consists of 5 sequential phases: 1) Requirement gathering and analysis, 2) Design, 3) Coding, 4) Testing, and 5) Maintenance. Each phase must be completed before moving to the next. The waterfall model provides structure, clear milestones, and is good for management control, but it does not allow for flexibility or iteration between phases. It is best used for projects with stable requirements that can be clearly defined upfront.
Structured system analysis and design Jayant Dalvi
Ā
The document discusses four common software development models: Waterfall, Spiral, Prototyping, and RAD (Rapid Application Development). It describes the key phases and characteristics of each model. The Waterfall model follows a linear sequence of phases from requirements to maintenance without iteration. The Spiral model is iterative with a risk-analysis focus. Prototyping emphasizes early customer feedback through prototypes. RAD prioritizes rapid delivery of high priority functionality through reuse and automated tools. Each model has advantages for certain types of projects depending on requirements clarity, budget, and risks.
Software Development Life Cycle (SDLC) is a process used by the software industry to design, develop and test high quality softwares. The SDLC aims to produce a high-quality software that meets or exceeds customer expectations, reaches completion within times and cost estimates.
SDLC is the acronym of Software Development Life Cycle.
It is also called as Software Development Process.
SDLC is a framework defining tasks performed at each step in the software development process.
ISO/IEC 12207 is an international standard for software life-cycle processes. It aims to be the standard that defines all the tasks required for developing and maintaining software.
The document discusses several software development life cycle models, including:
1) The waterfall model, which is a linear and sequential process that does not allow for iteration or changes.
2) Incremental process models which deliver working software in iterations with each cycle adding more functionality.
3) The iterative enhancement model which has the same phases as waterfall but allows for multiple cycles to refine requirements and add functionality.
4) The rapid application development model which emphasizes user involvement through prototyping and iterative development and refinement.
The document discusses several software development process models:
- The waterfall model is a sequential process with distinct phases from conception to maintenance. It works well for small, stable projects.
- The prototype model develops throwaway prototypes for user feedback to refine requirements. It is useful for complex systems with significant user interaction.
- The incremental model produces working software in modules, with each release adding functionality until complete. It allows for flexibility and early delivery.
- The spiral model is iterative like the incremental model but emphasizes risk analysis in each phase. It is well-suited for large, critical projects.
- The agile model delivers working software frequently through rapid, incremental cycles with user collaboration, valuing interaction over process.
The document discusses various software development models including waterfall, RAD, spiral, V-model, incremental, agile, iterative models. It provides details on when each model should be used, advantages and disadvantages of each model. It also discusses software quality management, ISO 9000 certification, CMMI, six sigma and various software project planning topics like cost estimation models, COCOMO model etc. The key project planning activities covered are software estimation, scheduling, monitoring and risk management.
This document provides an overview of various software development life cycle (SDLC) models including Waterfall, V-Shaped, Prototyping, Rapid Application Development (RAD), Incremental, Spiral, and Agile methods. Key aspects of each model are described such as typical phases, when each model is best suited, strengths, and weaknesses. Tailoring SDLC models to best fit individual projects is also discussed. The document concludes with a brief section on quality assurance and elements that should be considered in a quality assurance plan.
The document discusses several software process models, including:
- The waterfall model, which progresses through requirements, design, implementation, testing, and maintenance in a linear fashion. It is easy to understand but inflexible.
- The prototyping model, which builds prototypes to help refine requirements rather than freezing them early. This gets feedback from customers but prototypes may be mistaken for finished products.
- The spiral model, which is iterative and incremental, with each pass through the loop addressing process risks and allowing revisions of previous decisions.
The document discusses several software development life cycle (SDLC) models:
- The waterfall model is a linear model consisting of requirements, design, implementation, testing, installation, and maintenance phases. It works well for stable requirements but lacks flexibility.
- The spiral model adds risk analysis and prototyping to the waterfall model. Each cycle consists of planning, risk evaluation, development, and planning for the next phase. It allows for early risk assessment and feedback.
- The incremental model prioritizes requirements and implements them in groups, delivering an operational product in each release. It lowers costs but requires good planning.
- The rapid application development (RAD) model emphasizes user involvement and productivity tools. It delivers functionality
The document provides an overview of several software development life cycle (SDLC) models: Waterfall, Spiral, Agile, and Prototyping. It describes the key stages and processes of each model, when each is best applied, and their advantages and disadvantages. The Waterfall model is linear and sequential, while Spiral and Agile models are iterative with incremental improvements and flexibility. Prototyping focuses on early user involvement through prototypes to refine requirements.
4_25655_SE291_2020_1__2_1_Lecture 3 - Software Process Models.pptloloka1
Ā
This document provides an overview of various software process models and lifecycles including sequential, iterative, and agile models. It describes the build-and-fix, waterfall, incremental, rapid prototyping, spiral, extreme programming (XP), and unified process models. The waterfall model is presented as the pioneer sequential model characterized by documentation-driven phases. Incremental and rapid prototyping models deliver portions of software in iterations to obtain early feedback. The spiral model is risk-driven and guides teams to adopt elements from other models. Agile processes like XP emphasize customer satisfaction, small teams, and frequent delivery through iterations. The document discusses criteria for choosing a model based on factors like product complexity, team skills, and access
The document discusses several software development life cycle (SDLC) methodologies including waterfall, incremental, spiral, scrum/agile, rapid application development, and prototyping. Each methodology takes a different approach such as linear vs iterative processes, emphasis on planning vs flexibility, and when they are best applied based on factors like requirements stability, budget, and team experience.
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
The document outlines the topics that will be covered in an online software testing training, including an introduction to software testing, the software development life cycle, different testing methods and levels, types of testing, and the software testing life cycle. Key points covered are that software testing is the process of validating and verifying software to check if it meets requirements, identifies bugs, and ensures quality. It also discusses why testing is important for reducing maintenance costs and preventing failures.
The document discusses software testing, covering topics like what it is, why it's needed, different testing methods and levels, types of testing, the software testing life cycle, and prerequisites for software testing. Software testing is the process of validating and verifying software to check if it meets requirements, finds bugs, and works as expected. It helps assure lower maintenance costs and prevent failures. Various testing methods include black box, white box, and gray box testing.
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
Learntek is global online training provider on Big Data Analytics, Hadoop, Machine Learning, Deep Learning, IOT, AI, Cloud Technology, DEVOPS, Digital Marketing and other IT and Management courses.
The document outlines the topics that will be covered in an Apache Flink online training, including: what Apache Flink is; why use Apache Flink; its architecture, features, and deployment; its streaming, batch processing, and table APIs; complex event processing; graph processing; and integration with Hadoop. The training will cover Apache Flink's stream processing engine, fault tolerance, state management, and support for stream, batch, and iterative processing using its dataflow model.
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The document provides an overview of Google Cloud Platform (GCP) training. It discusses key GCP services and tools like Compute Engine, Storage, Databases, Containers, Dataflow, APIs, and deployment services. It also covers setting up a GCP account, managing services, identity and access management, networking, security concepts, monitoring with Stackdriver, and strategies for migrating applications to GCP. The training aims to help students learn how to use GCP services to build, deploy and manage cloud applications and infrastructure.
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Apache Spark with Java 8 training covers the basics of Apache Spark including its features like speed, support for multiple languages, and advanced analytics capabilities. It also covers Spark concepts like RDDs, DataFrames, and Spark SQL. The training discusses how Java 8 features like lambda expressions improve Spark development. It teaches Spark programming concepts and how to develop Spark applications and run them on clusters.
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About SDLC Models
Software Development Life Cycle ( also called SDLC Models ) is a workflow process
which defines the core stages and activities of development cycles or A framework
that describes the operations performed at each phase of a software development
project.
SDLC Models
The SDLC aims to produce high-quality software that meets or exceeds customer
expectations, reaches completion within times and cost estimates.
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Some of the SDLC Models are as follows
ā¢Waterfall Model
ā¢Incremental SDLC Model
ā¢Spiral Model
ā¢Evolutionary Prototyping Model
ā¢Agile Model
ā¢RAD Model
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1) Waterfall Model
ā¢It is one of the oldest and most well-known SDLC models
ā¢It follows a sequential step-by-step process from requirements analysis to
maintenance.
ā¢Systems that have well-defined and understood requirements are a good fit for the
Waterfall Model
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Waterfall Model Strong Points
ā¢Easy to understand, easy to use
ā¢Provides structure to inexperienced staff
ā¢Milestones are well understood
ā¢Sets requirements stability
ā¢Good for management control (plan, staff, track)
ā¢Works well when quality is more important than cost or schedule
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Limitation of the Waterfall Model
ā¢Not suitable for the project where requirements are changing.
ā¢The high amount of risk and uncertainty
ā¢Not good for the object-oriented project
ā¢Poor model for long and ongoing project
ā¢Can give a false impression of progress
ā¢Integration is one big bang at the end
ā¢Little opportunity for the customer to preview the system
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Suitable Situation to use Waterfall Model
ā¢Work well for a small project
ā¢When Requirements are very well known
ā¢When Product definition is stable
ā¢When Technology is understood
ā¢When New version of an existing product
ā¢When Porting a current product to a new platform.
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2) Incremental SDLC Model
ā¢In this model, it constructs a partial implementation of a total system that is divide
project into builds then slowly add functionality in each build.
ā¢The incremental model prioritizes the requirements of the system and then
implements them in groups.
ā¢Each subsequent release of the system adds function to the previous version until
all designed functionality has been implemented.
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Incremental Model Strong Points
ā¢Develop high-risk or major functions first
ā¢Each release delivers an operational product
ā¢The customer can respond to each build
ā¢Uses ādivide and conquerā breakdown of tasks
ā¢Lowers initial delivery cost
ā¢Initial product delivery is faster
ā¢Customers get important functionality early
ā¢Risk of changing requirements is reduced
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Incremental Model Limitations
ā¢Requires good planning and design
ā¢Needs an early definition of a complete and fully functional system to allow for the
definition of increments
ā¢Well-defined module interfaces are required (some will be developed long before
others)
ā¢The total cost of the complete system is higher than the waterfall model
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Suitable Situation to use Incremental Model
ā¢Risk, funding, schedule, program complexity, or need for early realization of
benefits.
ā¢Most of the requirements are known up-front but are expected to evolve over
time
ā¢A need to get basic functionality to the market early
ā¢On projects which have lengthy development schedules
ā¢On a project with new technology
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3) Spiral SDLC Model
ā¢It is a ārisk-drivenā iterative model
ā¢It divides a project into iterations
ā¢Each iteration deals with 1 or more risks
ā¢Each iteration starts with a small set of requirements and goes through the
development phase (except Installation and Maintenance) for those set of
requirements.
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Spiral Model Strong Points
ā¢It provides an early indication of insurmountable risks, without much cost
ā¢Development phases can be determined by the project manager, according to the
complexity of the project.
ā¢Users can be closely tied to all lifecycle steps and can see the system early because
of rapid prototyping tools
ā¢Project monitoring is very effective. Each phase requires a review from concerned
people (Early and frequent feedback from users). This makes the model more
transparent. The design does not have to be perfect
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ā¢Estimates such as budget and schedule become more realistic as work progressed
because important issues are discovered earlier.
ā¢Manages risks and develops the system into phases.
ā¢Changes can be introduced later in the life cycle as well.
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Spiral Model Limitations
ā¢Time spent on evaluating risks too substantial for small or low-risk projects
ā¢Time spent planning, resetting objectives, doing risk analysis and prototyping may be
excessive
ā¢The model is complex
ā¢Risk assessment expertise is required
ā¢Spiral may continue indefinitely
ā¢Maybe hard to define the objective, verifiable milestones that indicate readiness to
proceed through the next iteration
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ā¢High cost and time to reach the final product.
ā¢Needs special skills to evaluate the risks and assumptions.
Suitable Situation to use Spiral Model
ā¢When the creation of a prototype is appropriate
ā¢When costs and risk evaluation is important
ā¢For medium to high-risk projects
ā¢For Long-term project commitment unwise because of potential changes to economic
priorities
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ā¢When users are unsure of their needs
ā¢When requirements are complex
ā¢For New product line
ā¢When Significant changes are expected (research and exploration)
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4)Evolutionary Prototyping Model
ā¢Developers build a prototype during the requirements phase
ā¢The prototype is evaluated by end users
ā¢Users give corrective feedback
ā¢Developers further refine the prototype
ā¢When the user is satisfied, the prototype code is brought up to the standards needed
for a final product.
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Steps in Prototyping SDLC Models
ā¢A preliminary project plan is developed
ā¢A partial high-level paper model is created
ā¢The model is a source for a partial requirements specification
ā¢A prototype is built with basic and critical attributes
ā¢The designer builds the database, user interfaces, and algorithmic functions
ā¢The designer demonstrates the prototype, the user evaluates for problems and
suggests improvements.
ā¢This loop continues until the user is satisfied
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Evolutionary Prototyping SDLC Models Strong Points
ā¢Requires user involvement
ā¢Customers can āseeā the system requirements as they are being gathered.
ā¢Developers learn from customers
ā¢Reduce the development time
ā¢Reduce the development cost
ā¢Unexpected requirements accommodated
ā¢Allows for flexible design and development
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ā¢Missing functionalities can be easily added
ā¢Result in higher user satisfaction
Evolutionary Prototyping SDLC Models Limitations
ā¢Too much involvement of the customer
ā¢Insufficient analysis
ā¢The design is of less quality
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ā¢The resulting system is harder to maintain. Overall maintainability may be
overlooked
ā¢A prototype is a quick-and-dirtyā solution
ā¢The customer may want the prototype delivered.
ā¢The process may continue forever
ā Learn Business Analyst Training ā
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Suitable Situation to use Evolutionary Prototyping SDLC
Models
ā¢When requirements are unstable or must be clarified
ā¢For developing user interfaces
ā¢For Short-lived demonstrations
ā¢For the new, original development
ā¢With the analysis and design portions of object-oriented development.
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5)Agile Model
ā¢The biggest problem with software development is changing requirements
ā¢Agile processes accept the reality of change versus the hunt for complete, rigid
specifications
ā¢Speed up or bypass one or more life cycle phases
ā¢Usually less formal and reduced scope
ā¢Used for time-critical applications
ā¢Used in organizations that employ disciplined methods
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Agile Model Strong Points
ā¢It can adapt well with changing requirement
ā¢Deliver a working product faster than a conventional linear development model
ā¢Customer feedback at every stage ensures that the end deliverable satisfies their
expectations
ā¢No guesswork between the development team and the customer, as there is face
to face communication and continuous inputs from the client
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ā¢Decrease the time required to avail some system features.
ā¢A test can be conducted during the design cycle
ā¢Fewer risks and has more flexibilities
ā¢Modification in the system needs less time
ā¢The result is high-quality software in the least possible time duration and
satisfied customer.
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Agile Model Limitations
ā¢More Programmer centric than user-centric
ā¢For larger projects, it is difficult to judge the efforts and the time required for the
project in the SDLC.
ā¢Since the requirements are ever-changing, there is hardly any emphasis, which is
laid on designing and documentation. Therefore, chances of the project going off
the track easily are much more
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ā¢Scalability
ā¢The ability and collaboration of the customer to express user needs.
ā¢Documentation is done at later stages.
ā¢Reduce the usability of components.
ā¢Needs special skills for the team.
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Rapid Application Development Model (RAD)
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Phases in the RAD model are as follows,
ā¢Requirements planning phase ā a workshop utilizing structured discussion of
business problems
ā¢User description phase ā automated tools capture information from users
ā¢Construction phase ā productivity tools, such as code generators and screen
generators
ā¢Cutover phase ā installation of the system, user acceptance testing and user
training
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RAD Model Strong Points
ā¢Reduced cycle time and improved productivity with fewer people means lower costs
ā¢Time-box approach mitigates cost and schedule risk
ā¢It increases the reusability components
ā¢Greater customer satisfaction
ā¢Fast delivery time
ā¢Reduce the development time
ā¢The focus moves from documentation to code (WYSIWYG).
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ā¢Uses modeling concepts to capture information about business, data, and processes.
RAD Model Limitations
ā¢Large manpower is required to create the number of RD teams.
ā¢Risk of never achieving closure
ā¢Hard to use with legacy systems
ā¢Requires a system that can be modularized
ā¢Require highly skilled developer and designer.
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ā¢Not useful when technical risks are high
ā¢Developers and customers must be committed to rapid-fire activities in an
abbreviated time frame.
Suitable Situation to use RAD Model
ā¢Reasonably well-known requirements
ā¢The user involved throughout the life cycle
ā¢The project can be time-boxed
ā¢Functionality delivered in increments
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ā¢High performance not required
ā¢Low technical risks
ā¢The system can be modularised
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