The document discusses several software development life cycle (SDLC) models, including waterfall, iterative, spiral, V-model, big bang, RAD, and agile. It provides details on the waterfall, iterative, spiral, and V-model approaches, including their applications, advantages, and disadvantages. The waterfall model is described as the classic sequential approach. The iterative model allows for incremental improvements through repeated cycles. The spiral model combines iterative and waterfall elements. The V-model associates testing with each development stage.
The document presents information on the Software Development Life Cycle (SDLC), including:
1) It describes the seven main phases of the SDLC - planning, analysis, design, development, testing, implementation, and maintenance.
2) It discusses several SDLC models like waterfall, iterative, prototyping, spiral and V-model and compares their strengths and weaknesses.
3) It emphasizes the important role of testing in the SDLC and describes different testing types done during the phases.
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.
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.
The document discusses the main phases and models of the software development life cycle (SDLC). It describes common SDLC models like waterfall, spiral, and agile. The waterfall model involves sequential phases from requirements to maintenance. The spiral model is iterative with risk assessment. Agile emphasizes iterative development, collaboration, and responding to change. Testing methodologies like black box and white box testing are also summarized along with levels of testing from unit to system.
The document discusses the spiral model of software development. The spiral model is an iterative approach that combines prototyping and aspects of the waterfall model. It was defined by Barry Boehm in 1988 as a way to address risks through iterative evaluation and improvement of prototypes. The spiral model is best for medium to high risk projects where requirements are complex or expected to change. It involves evaluating prototypes, defining new prototypes based on learnings, and repeating this process until the final product is delivered.
The Waterfall model is a popular sequential model of the software development life cycle where each phase must be completed before the next begins. It consists of requirements, design, implementation, verification, and maintenance phases. Though simple to understand and manage, the Waterfall model works best for smaller, well-defined projects as it is inflexible to changes and produces no working software until late in the cycle.
The document discusses several software development life cycle (SDLC) models:
- The waterfall model is a linear and sequential approach with distinct phases for requirements, design, implementation, testing, and deployment. It works well for projects with stable requirements.
- The V-shaped model emphasizes verification and validation testing at each phase. It is suited for projects requiring high reliability.
- Evolutionary prototyping involves building prototypes early and getting user feedback in iterations to refine requirements. It helps clarify unstable requirements.
- Rapid application development (RAD) emphasizes user involvement and productivity tools to reduce cycle times. It is suited when requirements are reasonably well known.
- Incremental development delivers partial systems in increments to get early benefits while allowing
The document defines the software development life cycle (SDLC) and its phases. It discusses several SDLC models including waterfall, prototype, iterative enhancement, and spiral. The waterfall model follows sequential phases from requirements to maintenance with no overlap. The prototype model involves building prototypes for user feedback. The iterative enhancement model develops software incrementally. The spiral model is divided into risk analysis, engineering, construction, and evaluation cycles. The document also covers software requirements, elicitation through interviews and use cases, analysis through data, behavioral and functional modeling, and documentation in a software requirements specification.
The document presents information on the Software Development Life Cycle (SDLC), including:
1) It describes the seven main phases of the SDLC - planning, analysis, design, development, testing, implementation, and maintenance.
2) It discusses several SDLC models like waterfall, iterative, prototyping, spiral and V-model and compares their strengths and weaknesses.
3) It emphasizes the important role of testing in the SDLC and describes different testing types done during the phases.
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.
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.
The document discusses the main phases and models of the software development life cycle (SDLC). It describes common SDLC models like waterfall, spiral, and agile. The waterfall model involves sequential phases from requirements to maintenance. The spiral model is iterative with risk assessment. Agile emphasizes iterative development, collaboration, and responding to change. Testing methodologies like black box and white box testing are also summarized along with levels of testing from unit to system.
The document discusses the spiral model of software development. The spiral model is an iterative approach that combines prototyping and aspects of the waterfall model. It was defined by Barry Boehm in 1988 as a way to address risks through iterative evaluation and improvement of prototypes. The spiral model is best for medium to high risk projects where requirements are complex or expected to change. It involves evaluating prototypes, defining new prototypes based on learnings, and repeating this process until the final product is delivered.
The Waterfall model is a popular sequential model of the software development life cycle where each phase must be completed before the next begins. It consists of requirements, design, implementation, verification, and maintenance phases. Though simple to understand and manage, the Waterfall model works best for smaller, well-defined projects as it is inflexible to changes and produces no working software until late in the cycle.
The document discusses several software development life cycle (SDLC) models:
- The waterfall model is a linear and sequential approach with distinct phases for requirements, design, implementation, testing, and deployment. It works well for projects with stable requirements.
- The V-shaped model emphasizes verification and validation testing at each phase. It is suited for projects requiring high reliability.
- Evolutionary prototyping involves building prototypes early and getting user feedback in iterations to refine requirements. It helps clarify unstable requirements.
- Rapid application development (RAD) emphasizes user involvement and productivity tools to reduce cycle times. It is suited when requirements are reasonably well known.
- Incremental development delivers partial systems in increments to get early benefits while allowing
The document defines the software development life cycle (SDLC) and its phases. It discusses several SDLC models including waterfall, prototype, iterative enhancement, and spiral. The waterfall model follows sequential phases from requirements to maintenance with no overlap. The prototype model involves building prototypes for user feedback. The iterative enhancement model develops software incrementally. The spiral model is divided into risk analysis, engineering, construction, and evaluation cycles. The document also covers software requirements, elicitation through interviews and use cases, analysis through data, behavioral and functional modeling, and documentation in a software requirements specification.
S.D.L.C (Software Development Life Cycle.)Jayesh Buwa
The document discusses the Software Development Life Cycle (SDLC), which provides an overall framework for managing the software development process. There are two main approaches to the SDLC - predictive and adaptive. All projects use some variation of the SDLC, which typically includes phases like requirements definition, design, development, testing, deployment, and maintenance. Common SDLC models discussed include waterfall, incremental, spiral, and agile methods. The strengths and weaknesses of different models are compared.
This document discusses different process models used in software development. It describes the key phases and characteristics of several common process models including waterfall, prototyping, V-model, incremental, iterative, spiral and agile development models. The waterfall model involves sequential phases from requirements to maintenance without iteration. Prototyping allows for user feedback earlier. The V-model adds verification and validation phases. Incremental and iterative models divide the work into smaller chunks to allow for iteration and user feedback throughout development.
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.
The V-Model is a software development lifecycle model that structures testing activities in parallel to steps in the design process. It extends the waterfall model by performing testing at each development stage in both forward and reverse direction. This allows bugs to be found early and defects to be tracked proactively. The V-Model follows a strict process to develop quality software and constantly measures productivity through test case creation and coverage. However, it requires significant resources and money, and changes midway require updating documentation.
Waterfall Model PPT in Software EngineeringRaju Sheoran
What is Waterfall Model? History of waterfall model, Advantages, Disadvantages and much more realted to waterfall model.
The waterfall model is the basic and simple software development life cycle model. But idealistic. Earlier the waterfall model was very popular but these days it is not used while software development. And the model was divided into phases and all the phases are organized in linear order. This model was first introduced by Dr. Winston in 1970.
This model is very popular and very important because all the models in software development life cycle models are based on it. So, we can call it, It is the base of all software development life cycle models or it is known as Classical Waterfall Model.
The document discusses several software development life cycle (SDLC) models including Waterfall, V-Shaped, Prototyping, Rapid Application Development (RAD), Incremental, and Spiral models. For each model, it describes the key steps, strengths, weaknesses, and when each model is best applied. The models range from traditional sequential models like Waterfall to more iterative models like Prototyping and RAD.
The document discusses the software development life cycle (SDLC) process. It includes 6 main steps: 1) requirement gathering, 2) software analysis, 3) software design, 4) coding, 5) testing, and 6) implementation. For each step, the document provides details on the objectives and activities involved. It also lists advantages of following the SDLC process such as increased quality, improved tracking, and decreased risks. Finally, it provides a coding example for a basic calculator application to illustrate one step of the process.
The document discusses several software development life cycle (SDLC) models:
1) The waterfall model is a linear model that progresses through requirements, design, implementation, testing, and deployment phases. It works well for projects with stable requirements but lacks flexibility.
2) The V-shaped model emphasizes testing at each phase. It is good for high reliability projects but does not handle changes well.
3) Prototyping models involve building prototypes early for user feedback to refine requirements. This improves accuracy but risks scope creep.
4) Incremental models prioritize requirements and implement them in phases to deliver working functionality early. This reduces risk but requires strong planning.
5) The spiral model incorporates risk analysis and protot
The document discusses the Software Development Life Cycle (SDLC), including its objectives, common phases and models. The key models described are waterfall, prototyping, spiral, RAD and agile. Waterfall is the classical sequential model but is inflexible. Prototyping and spiral address changing requirements through iterative cycles. RAD focuses on rapid development through reuse, workshops and early user testing. Agile methods emphasize speed, reduced formal processes and adaptability. The conclusion recommends RAD for mashup projects due to its support for iterative requirements changes and modular development.
Software development process models
Rapid Application Development (RAD) Model
Evolutionary Process Models
Spiral Model
THE FORMAL METHODS MODEL
Specialized Process Models
The Concurrent Development Model
List of Software Development Model and MethodsRiant Soft
RiantSoft a Software Development Company derived the most useful and different types of Software Development Model for the users who want to know the development process. RiantSoft is specialized in custom software development with latest cutting edge technologies.
The V-model is a software development lifecycle framework where each phase of development (requirements, design, implementation, testing) has a corresponding testing phase that validates the product. The V-model is best for small to medium projects with clearly defined requirements, and allows testing activities to start early by planning tests before coding begins. Key phases include requirements analysis, system design, module design and coding, unit testing, integration testing, system testing, and user acceptance testing.
Learn about Agile Methodology of Software Engineering and study concepts like What is Agile, Why Agile is there, Agile Principles, Agile Manifesto with Pros & Cons of it.
Presentation also include Agile Testing Methodology like Scrum, Crystal Methodologies, DSDM, Feature Driven Development, Lean Software Development & Extreme Programming.
If you watch this one please rate it and do share this presentation to others so then can easily learn more about the Agile Methodology.
The document discusses the waterfall model of software development. It describes the five phases of the waterfall model as requirements gathering and analysis, design, coding, testing, and maintenance. It provides details on the activities in each phase, including documenting requirements, designing logical modules, writing code, testing software, and maintaining the system. The waterfall model is advantageous for small projects but inflexible if requirements change, as it is a sequential process where each phase must be completed before the next.
The document discusses various software development life cycle (SDLC) models. It describes the phases of SDLC as requirements gathering and analysis, design, development, testing, implementation, and maintenance. Several common models are explained in detail, including the waterfall model, prototyping model, incremental model, and spiral model. The waterfall model follows a sequential process from requirements to maintenance, while other iterative models allow for more customer feedback and flexibility to change requirements over multiple iterations of development. Choosing the appropriate model depends on factors like project risks, requirements stability, and need for early delivery of basic functionality.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
A Water Fall Model is easy to flow.
It can be implemented for any size of project.
Every stage has to be done separately at the right time so you cannot jump stages.
Documentation is produced at every stage of a waterfall model allowing people to understand what has been done.
Testing is done at every stage.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This approach carries less risk than a traditional Waterfall approach but is still far more risky and less efficient than a more Agile approaches.
In Iterative model, iterative process starts with a simple implementation of a small set of the software requirements and iteratively enhances the evolving versions until the complete system is implemented and ready to be deployed.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
The first formal description of the waterfall model is often cited as a 1970 article by Winston W. Royce
Royce did not use the term "waterfall" in this article.
Royce presented this model as an example of a flawed, non-working model.
The document discusses different software development life cycle (SDLC) models including waterfall, iterative, spiral, and V-model. It provides an overview of each model, describing their key characteristics and phases. Pros and cons are outlined for each model. The waterfall model follows sequential phases from concept to maintenance. The iterative model develops the software incrementally in cycles. The spiral model similarly progresses iteratively but with a risk management focus. The V-model incorporates testing activities parallel to development phases. The document notes agile models are now commonly used in industry.
1. This will help to understand the different types of SDLC models in Software Testing.
2. Advantages and Disadvantages of SDLC models.
3. Why these many models developed and what was the benefit over the existing ones?
S.D.L.C (Software Development Life Cycle.)Jayesh Buwa
The document discusses the Software Development Life Cycle (SDLC), which provides an overall framework for managing the software development process. There are two main approaches to the SDLC - predictive and adaptive. All projects use some variation of the SDLC, which typically includes phases like requirements definition, design, development, testing, deployment, and maintenance. Common SDLC models discussed include waterfall, incremental, spiral, and agile methods. The strengths and weaknesses of different models are compared.
This document discusses different process models used in software development. It describes the key phases and characteristics of several common process models including waterfall, prototyping, V-model, incremental, iterative, spiral and agile development models. The waterfall model involves sequential phases from requirements to maintenance without iteration. Prototyping allows for user feedback earlier. The V-model adds verification and validation phases. Incremental and iterative models divide the work into smaller chunks to allow for iteration and user feedback throughout development.
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.
The V-Model is a software development lifecycle model that structures testing activities in parallel to steps in the design process. It extends the waterfall model by performing testing at each development stage in both forward and reverse direction. This allows bugs to be found early and defects to be tracked proactively. The V-Model follows a strict process to develop quality software and constantly measures productivity through test case creation and coverage. However, it requires significant resources and money, and changes midway require updating documentation.
Waterfall Model PPT in Software EngineeringRaju Sheoran
What is Waterfall Model? History of waterfall model, Advantages, Disadvantages and much more realted to waterfall model.
The waterfall model is the basic and simple software development life cycle model. But idealistic. Earlier the waterfall model was very popular but these days it is not used while software development. And the model was divided into phases and all the phases are organized in linear order. This model was first introduced by Dr. Winston in 1970.
This model is very popular and very important because all the models in software development life cycle models are based on it. So, we can call it, It is the base of all software development life cycle models or it is known as Classical Waterfall Model.
The document discusses several software development life cycle (SDLC) models including Waterfall, V-Shaped, Prototyping, Rapid Application Development (RAD), Incremental, and Spiral models. For each model, it describes the key steps, strengths, weaknesses, and when each model is best applied. The models range from traditional sequential models like Waterfall to more iterative models like Prototyping and RAD.
The document discusses the software development life cycle (SDLC) process. It includes 6 main steps: 1) requirement gathering, 2) software analysis, 3) software design, 4) coding, 5) testing, and 6) implementation. For each step, the document provides details on the objectives and activities involved. It also lists advantages of following the SDLC process such as increased quality, improved tracking, and decreased risks. Finally, it provides a coding example for a basic calculator application to illustrate one step of the process.
The document discusses several software development life cycle (SDLC) models:
1) The waterfall model is a linear model that progresses through requirements, design, implementation, testing, and deployment phases. It works well for projects with stable requirements but lacks flexibility.
2) The V-shaped model emphasizes testing at each phase. It is good for high reliability projects but does not handle changes well.
3) Prototyping models involve building prototypes early for user feedback to refine requirements. This improves accuracy but risks scope creep.
4) Incremental models prioritize requirements and implement them in phases to deliver working functionality early. This reduces risk but requires strong planning.
5) The spiral model incorporates risk analysis and protot
The document discusses the Software Development Life Cycle (SDLC), including its objectives, common phases and models. The key models described are waterfall, prototyping, spiral, RAD and agile. Waterfall is the classical sequential model but is inflexible. Prototyping and spiral address changing requirements through iterative cycles. RAD focuses on rapid development through reuse, workshops and early user testing. Agile methods emphasize speed, reduced formal processes and adaptability. The conclusion recommends RAD for mashup projects due to its support for iterative requirements changes and modular development.
Software development process models
Rapid Application Development (RAD) Model
Evolutionary Process Models
Spiral Model
THE FORMAL METHODS MODEL
Specialized Process Models
The Concurrent Development Model
List of Software Development Model and MethodsRiant Soft
RiantSoft a Software Development Company derived the most useful and different types of Software Development Model for the users who want to know the development process. RiantSoft is specialized in custom software development with latest cutting edge technologies.
The V-model is a software development lifecycle framework where each phase of development (requirements, design, implementation, testing) has a corresponding testing phase that validates the product. The V-model is best for small to medium projects with clearly defined requirements, and allows testing activities to start early by planning tests before coding begins. Key phases include requirements analysis, system design, module design and coding, unit testing, integration testing, system testing, and user acceptance testing.
Learn about Agile Methodology of Software Engineering and study concepts like What is Agile, Why Agile is there, Agile Principles, Agile Manifesto with Pros & Cons of it.
Presentation also include Agile Testing Methodology like Scrum, Crystal Methodologies, DSDM, Feature Driven Development, Lean Software Development & Extreme Programming.
If you watch this one please rate it and do share this presentation to others so then can easily learn more about the Agile Methodology.
The document discusses the waterfall model of software development. It describes the five phases of the waterfall model as requirements gathering and analysis, design, coding, testing, and maintenance. It provides details on the activities in each phase, including documenting requirements, designing logical modules, writing code, testing software, and maintaining the system. The waterfall model is advantageous for small projects but inflexible if requirements change, as it is a sequential process where each phase must be completed before the next.
The document discusses various software development life cycle (SDLC) models. It describes the phases of SDLC as requirements gathering and analysis, design, development, testing, implementation, and maintenance. Several common models are explained in detail, including the waterfall model, prototyping model, incremental model, and spiral model. The waterfall model follows a sequential process from requirements to maintenance, while other iterative models allow for more customer feedback and flexibility to change requirements over multiple iterations of development. Choosing the appropriate model depends on factors like project risks, requirements stability, and need for early delivery of basic functionality.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
A Water Fall Model is easy to flow.
It can be implemented for any size of project.
Every stage has to be done separately at the right time so you cannot jump stages.
Documentation is produced at every stage of a waterfall model allowing people to understand what has been done.
Testing is done at every stage.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This model was not the first model to discuss iterative development.
As originally envisioned, the iterations were typically 6 months to 2 years long.
Each phase starts with a design goal and ends with the client (who may be internal) reviewing the progress thus far.
Analysis and engineering efforts are applied at each phase of the project, with an eye toward the end goal of the project.
This approach carries less risk than a traditional Waterfall approach but is still far more risky and less efficient than a more Agile approaches.
In Iterative model, iterative process starts with a simple implementation of a small set of the software requirements and iteratively enhances the evolving versions until the complete system is implemented and ready to be deployed.
Iterative model.
Spiral model
RAD(Rapid application development)
model.
The first formal description of the waterfall model is often cited as a 1970 article by Winston W. Royce
Royce did not use the term "waterfall" in this article.
Royce presented this model as an example of a flawed, non-working model.
The document discusses different software development life cycle (SDLC) models including waterfall, iterative, spiral, and V-model. It provides an overview of each model, describing their key characteristics and phases. Pros and cons are outlined for each model. The waterfall model follows sequential phases from concept to maintenance. The iterative model develops the software incrementally in cycles. The spiral model similarly progresses iteratively but with a risk management focus. The V-model incorporates testing activities parallel to development phases. The document notes agile models are now commonly used in industry.
1. This will help to understand the different types of SDLC models in Software Testing.
2. Advantages and Disadvantages of SDLC models.
3. Why these many models developed and what was the benefit over the existing ones?
The document discusses several common system analysis methodologies:
- Waterfall model is linear and sequential, best for well-defined requirements that don't change.
- V-model is similar to waterfall but adds testing phases to each development phase.
- Prototyping allows users to evaluate early versions before full development.
- Spiral model is iterative with risk analysis and prototypes, suitable for uncertain or changing requirements.
- Agile methods embrace changing needs and focus on frequent delivery of working software through collaboration.
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 waterfall model is a sequential software development process that consists of distinct stages: requirements, design, implementation, verification, and maintenance. In this model, each stage must be fully completed before the next begins and there is no overlap or iteration between stages. While easy to understand, the waterfall model is rigid and not well-suited for complex or long-term projects where requirements may change.
The document discusses several software development life cycle (SDLC) models:
- The Waterfall model is a linear sequential process that progresses through requirements, design, implementation, testing, deployment and maintenance phases. It is simple but inflexible.
- Iterative models develop software incrementally in iterations, allowing requirements to evolve. They provide early results but require more resources.
- The Spiral model repeats a risk-analysis cycle of planning, engineering and evaluation. It handles changing requirements well but is complex.
- The V-model performs testing in parallel with development phases. It is disciplined but rigid and not suitable for changing requirements.
- The Big Bang model starts development without planning. It has minimal resources
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.
The document presents a student presentation on the waterfall model of software development. It describes the waterfall model as having sequential phases from requirements analysis through deployment, with the output of each phase forming the input for the next. The phases are described as requirements analysis, system design, implementation, integration and testing, and deployment. Advantages of the waterfall model include its simplicity and structure, while disadvantages include inability to accommodate changing requirements or measure progress within phases.
A software process model is an abstraction of the software development process. The models specify the stages and order of a process. So, think of this as a representation of the order of activities of the process and the sequence in which they are performed
The document provides information on Agile vs Waterfall methodologies for software development. It describes Agile as an iterative approach that values individuals, interactions, working software and responding to change over processes, tools, documentation and following a plan. Waterfall is described as a linear sequential process where each phase must be completed before the next can begin. The document outlines the phases and characteristics of both approaches and discusses their pros and cons for different project types.
The document discusses various aspects of the design process for interactive systems, including design rules, usability engineering, and iterative design. It provides an overview of different types of design rules such as principles, standards, and guidelines. Specific examples of design rules like learnability, flexibility, and robustness are mentioned. Ben Shneiderman's eight golden rules of interface design are also summarized, which include consistency, informative feedback, error handling, and reducing memory load.
The waterfall model is a linear sequential software development process where each phase must be completed before the next phase begins. It was the earliest software development life cycle model used. The phases include requirements gathering, design, implementation, testing, deployment, and maintenance. While it is simple and easy to understand, it does not allow for overlap between phases or changes to requirements, making it unsuitable for complex or long-term projects with uncertain requirements.
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.
The document describes different software development lifecycle models including the V-model and Waterfall model. It provides advantages and disadvantages of each:
- The V-model is simple and easy to use, with testing occurring before coding to save time and find defects early. However, it does not produce early prototypes and changes require updating documents. The V-model is best for small-to-medium, clearly defined projects.
- The Waterfall model requires each phase be completed before starting the next. Errors can only be fixed in the same phase. It is best for smaller, stable projects with clear requirements but not for complex projects with frequent changes.
The document provides an overview of traditional predictive and adaptive software development processes, including waterfall, iterative incremental, and spiral models. It then discusses agile software development processes like Scrum and extreme programming. Key aspects of each methodology are defined such as roles, meetings, user stories, and emphasis on rapid delivery through short iterations. Adaptive methods prioritize quickly adapting to changes while predictive methods focus on detailed long-term planning.
The document discusses the software development life cycle (SDLC) process. It describes the typical stages in SDLC, including planning, requirements analysis, defining requirements, designing architecture, building the product, testing, and deployment/maintenance. It also discusses different SDLC models such as waterfall, iterative, prototyping, evolutionary, and spiral. The classic waterfall model involves completing each sequential stage fully before moving to the next, while other models allow for more overlap and iteration between stages.
The document discusses various software process models including prescriptive models like waterfall model and incremental process model. It also covers evolutionary models like prototyping and spiral process model. Specialized models covered are component based development, formal methods model, aspect oriented development and unified process model. The key highlights are that different models are suited for different situations based on project needs and each model has advantages and disadvantages to consider.
The document describes various software development life cycle (SDLC) models. It discusses the waterfall model, iterative model, spiral model, V-model, and big bang model. For each model, it provides an overview of the design, typical application scenarios, and pros and cons. The key stages of the waterfall model are outlined in detail, including planning, requirements, design, implementation, testing, deployment, and maintenance.
CapTechTalks Webinar Slides June 2024 Donovan Wright.pptxCapitolTechU
Slides from a Capitol Technology University webinar held June 20, 2024. The webinar featured Dr. Donovan Wright, presenting on the Department of Defense Digital Transformation.
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 3)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
Lesson Outcomes:
- students will be able to identify and name various types of ornamental plants commonly used in landscaping and decoration, classifying them based on their characteristics such as foliage, flowering, and growth habits. They will understand the ecological, aesthetic, and economic benefits of ornamental plants, including their roles in improving air quality, providing habitats for wildlife, and enhancing the visual appeal of environments. Additionally, students will demonstrate knowledge of the basic requirements for growing ornamental plants, ensuring they can effectively cultivate and maintain these plants in various settings.
Brand Guideline of Bashundhara A4 Paper - 2024khabri85
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Sdlc models
1. SOFTWARE DEVELOPMENT LIFE CYCLE MODELS:
SUBMITTED TO: SUBMITTED BY:
MRS. M.ANITHA V.KARTHIK. B.SC(C.S)
SHINE TRAINER, SHINE TRAINEE,
ASPIRE SYSTEMS. ASPIRE SYSTEM.
2. SDLC(SOFTWARE DEVELOPMENT LIFE CYCLE):
It is also called as software development process. SDLC is a process which is
used to develop, design a software and also modify the software which can be used
mostly in the software industry.
SDLC consists of detailed plan describing how to develop, replace, maintain
modify the software. The life cycle defines to improve the quality of the software and
overall description process.
ISO/IEC 12207 is an international standard for software development life
cycle.
Some of the stages of the softwarwe development life cycle is as follows
▪ Planning and Requirement Analysis
▪ Defining Requirements
▪ Designing the Product Architecture
▪ Building or Developing the Product
▪ Testing the Product
▪ Deployment in the Market and Maintenance
SDLC MODELS:
There are various software development life cycle models defined and
designed which are followed during the software development process. They are as
follows.
▪ Waterfall model
▪ Iterative model
▪ Spiral model
▪ V-model
▪ Big bang model
▪ RAD model
▪ Agile model.
3. WATERFALL MODEL:
Waterfall model was the first SDLC model to be used widely in software
engineering to ensure sucessfull of the project. Waterfall model is a continuous
process so that the process cannot able to modify the software by backtracking the
processs. It is a classic life cycle model. Each process is completed before next starts.
APPLICATION FOR WATERFALL:
➢ Requirements are very well documented, clear and fixed.
➢ Product definition is stable.
➢ Technology is understood and non complex
➢ There are no ambiguous requirement.
➢ Amble resources with reqiured expertise are available to support the
product.
➢ The project is short.
ADVANTAGES OF WATERFALL:
➢ Simple and easy to understand and use.
➢ Easy to manage due to rigidity of the model.
➢ Phases are processed and completed one at a time.
➢ Works well for smaller projects where requirements are very well
understood.
➢ Process and results are well documented.
➢ Easy to arrange tasks.
DISADVANTAGES OF WATERFALL:
➢ You cannot go back a step if the design phase has gone wrong, things can
get very complicated in the implementation phase.
➢ High amounts of risk and uncertainty.
➢ Not a good model for complex and object-oriented projects.
➢ Poor model for long and on-going projects.
➢ Not suitable for the projects where requirements are at a moderate to high
risk of changing.
4. ITERATIVE MODEL:
Iterative life cycle model starts with a simple set of software requirements and
begin to implement and after again iteratively enhances the evolving versions until
the full system is implemented.
At each iteration, design modification are made and new functional capabilities
are added. For each iteration it must review the software.
APPLICATION FOR ITERATIVE:
➢ Requirements of the complete system are clearly defined and understood.
➢ Major requirements must be defined however, some functionalities or
requested enhancements may evolve with time.
➢ There is a time to market constraint.
➢ A new technology is being used and is being learnt by the development
team while working on the project.
➢ Resources with needed skll sets are not available and are planned to be used
on contract basis for specific iterations.
➢ There are some high-risk features and goals which may change in the
future.
ADVANTAGES OF ITERATIVE:
➢ Some working functionality can be developed quickly and early in the life
cycle.
➢ Results are obtained early and periodically.
➢ Parallel development can be planned.
➢ Progress can be measured.
➢ Less costly to change the scope/requirements.
➢ Testing and debugging during smaller iteration is easy.
➢ Risks are identified and resolved during iteration; and each iteration is an
easily managed milestone.
➢ Easier to manage risk - High risk part is done first.
➢ With every increment, operational product is delivered.
5. ➢ Issues, challenges and risks identified from each increment can be
utilized/applied to the next increment.
➢ Risk analysis is better.
➢ It supports changing requirements.
➢ Initial Operating time is less.
➢ Better suited for large and mission-critical projects.
➢ During the life cycle, software is produced early which facilitates customer
evaluation and feedback.
DISADVANTAGES OF ITERATIVE:
➢ More resources may be required.
➢ Although cost of change is lesser, but it is not very suitable for changing
requirements.
➢ More management attention is required.
➢ System architecture or design issues may arise because not all requirements
are gathered in the beginning of the entire life cycle.
➢ Defining increments may require definition of the complete system.
➢ Not suitable for smaller projects.
➢ Management complexity is more.
➢ End of project may not be known which is a risk.
➢ Highly skilled resources are required for risk analysis.
➢ Projects progress is highly dependent upon the risk analysis phase.
6. SPIRAL MODEL:
The spiral model is the combination of iterative model and classic life cycle
model i.e waterfall model.A software project repeatedly passes through these phases
in iterations is called Spirals.
Some of the process based on the spiral model:
➢ Identification
➢ Design
➢ Construct and design
➢ Evaluation and risk analysis.
APPLICATION FOR SPIRAL MODEL:
➢ When there is a budget constraint and risk evaluation is important.
➢ For medium to high-risk projects.
➢ Long-term project commitment because of potential changes to economic
priorities as the requirements change with time.
➢ Customer is not sure of their requirements which is usually the case.
➢ Requirements are complex and need evaluation to get clarity.
➢ New product line which should be released in phases to get enough customer
feedback.
➢ Significant changes are expected in the product during the development
cycle.
ADVANTAGES OF SPIRAL MODEL:
➢ Changing requirements can be accommodated.
➢ Allows extensive use of prototypes.
➢ Requirements can be captured more accurately.
➢ Users see the system early.
➢ Development can be divided into smaller parts and the risky parts can be
developed earlier which helps in better risk management.
7. DISADVANTAGES OF SPIRAL MODEL:
➢ Management is more complex.
➢ End of the project may not be known early.
➢ Not suitable for small or low risk projects and could be expensive for small
projects.
➢ Process is complex
➢ Spiral may go on indefinitely.
➢ Large number of intermediate stages requires excessive documentation.
V-MODEL:
The V-model is an SDLC model where execution of processes happens in a
sequential manner in a V-shape. It is also known as Verification and Validation
model.
The v-model is the extension for waterfall model and is based on the
association of testing phase for each corresponding development process. This means
in development process every stages there is an associative testing process.
There are several verification phases they are
➢ Business Requirement Analysis
➢ System Design
➢ Architectural Design
➢ Module Design.
Some of the validation phases are
➢ Unit Testing
➢ Integration Testing
➢ System Testing
➢ Acceptance Testing
APPLICATION FOR V-MODEL:
➢ Requirements are well defined, clearly documented and fixed.
➢ Product definition is stable.
8. ➢ Technology is not dynamic and is well understood by the project
team.
➢ There are no ambiguous or undefined requirements.
➢ The project is short.
ADVANTAGES OF V-MODEL:
➢ This is a highly-disciplined model and Phases are completed
one at a time.
➢ Works well for smaller projects where requirements are very
well understood.
➢ Simple and easy to understand and use.
➢ Easy to manage due to the rigidity of the model. Each phase has
specific deliverables and a review process.
DISADVANTAGES OF V-MODEL:
➢ High risk and uncertainty.
➢ Not a good model for complex and object-oriented projects.
➢ Poor model for long and ongoing projects.
➢ Not suitable for the projects where requirements are at a moderate
to high risk of changing.
➢ Once an application is in the testing stage, it is difficult to go
back and change a functionality.
➢ No working software is produced until late during the life cycle.
BIG BANG MODEL:
The Big Bang model is an SDLC model where we do not follow any specific
process. The development just starts with the required money and efforts as the input,
and the output is the software developed which may or may not be as per customer
9. requirement. This Big Bang Model does not follow and there is very little planning
required. Even the customer is not sure about what exactly he wants and the
requirements are implemented on the fly without much analysis.
This model is ideal for small projects with one or two developers working
together and is also useful for academic or practice projects. It is an ideal model for
the product where requirements are not well understood and the final release date is
not given.
APPLICATION FOR BIGBANG MODEL:
The Big Bang Model comprises of focusing all the possible resources in the
software development and coding, with very little or no planning. The requirements
are understood and implemented as they come. Any changes required may or may not
need to revamp the complete software.
This model is ideal for small projects with one or two developers working
together and is also useful for academic or practice projects. It is an ideal model for
the product where requirements are not well understood and the final release date is
not given.
ADVANTAGES OF BIG BANG MODEL:
➢ This is a very simple model.
➢ Little or no planning required.
➢ Easy to manage.
➢ Very few resources required.
➢ Gives flexibility to developers.
➢ It is a good learning aid for new comers or students.
DISADVANTAGES OF BIG BANG MODEL:
➢ Very High risk and uncertainty.
➢ Not a good model for complex and object-oriented projects.
10. ➢ Poor model for long and ongoing projects.
➢ Can turn out to be expensive if requirements are misunderstood.
AGILE MODEL:
Agile SDLC model is a combination of iterative and incremental process
models with focus on process adaptability and customer satisfaction by rapid delivery
of working software product. Agile Methods break the product into small incremental
builds. These builds are provided in iterations. Each iteration typically lasts from
about one to three weeks.
Agile model believes that every project needs to be handled differently and the
existing methods need to be tailored to best suit the project requirements. In Agile,
the tasks are divided to time boxes (small time frames) to deliver specific features for
a release.
Some of the various process involed in agile model are
✔ Planning
✔ Requirements Analysis
✔ Design
✔ Coding
✔ Unit Testing and
✔ Acceptance Testing.
ADVANTAGES OF AGILE MODEL:
➢ Is a very realistic approach to software development.
➢ Promotes teamwork and cross training.
➢ Functionality can be developed rapidly and demonstrated.
➢ Resource requirements are minimum.
➢ Suitable for fixed or changing requirements
➢ Delivers early partial working solutions.
➢ Good model for environments that change steadily.
➢ Minimal rules, documentation easily employed.
➢ Enables concurrent development and delivery within an overall
planned context.
➢ Little or no planning required.
➢ Easy to manage.
➢ Gives flexibility to developers.
11. DISADVANTAGES OF AGILE MODEL:
➢ Not suitable for handling complex dependencies.
➢ More risk of sustainability, maintainability and extensibility.
➢ An overall plan, an agile leader and agile PM practice is a must
without which it will not work.
➢ Strict delivery management dictates the scope, functionality to be
delivered, and adjustments to meet the deadlines.
➢ Depends heavily on customer interaction, so if customer is not clear,
team can be driven in the wrong direction.
➢ There is a very high individual dependency, since there is minimum
documentation generated.
➢ Transfer of technology to new team members may be quite
challenging due to lack of documentation.
RAPID APPLICATION DEVELOPMENT MODEL:
RAD model is Rapid Application Development model. It is a type of
incremental model. In RAD model the components or functions are developed in
parallel as if they were mini projects. The developments are time boxed, delivered
and then assembled into a working prototype. This can quickly give the customer
12. something to see and use and to provide feedback regarding the delivery and their
requirements.
Some of the phases of rapid application development model are:
✔ Business modeling.
✔ Data modeling.
✔ Process modeling.
✔ Application generation.
✔ Testing and turnover.
APPLICATION FOR RAD MODEL:
➢ RAD should be used when there is a need to create a system that can
be modularized in 2-3 months of time.
➢ It should be used if there’s high availability of designers for
modeling and the budget is high enough to afford their cost along
with the cost of automated code generating tools.
➢ RAD SDLC model should be chosen only if resources with high
business knowledge are available and there is a need to produce the
system in a short span of time (2-3 months).
ADVANTAGES OF RAD MODEL:
➢ Reduced development time.
➢ Increases reusability of components
➢ Quick initial reviews occur
➢ Encourages customer feedback
➢ Integration from very beginning solves a lot of integration issues.
DISADVANTAGES OF RAD MODEL:
➢ Depends on strong team and individual performances for identifying
business requirements.
➢ Only system that can be modularized can be built using RAD
➢ Requires highly skilled developers/designers.
➢ High dependency on modeling skills
➢ Inapplicable to cheaper projects as cost of modeling and automated
code generation is very high.