Waterfall and Prototype model
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The document summarizes the waterfall and prototype models. The waterfall model involves sequential phases of requirement analysis, design, development, testing, deployment and maintenance with no overlap or feedback between phases. It is simple but does not allow for changes. The prototype model uses sample systems to clarify requirements, and has variants like throwaway, evolutionary and incremental prototyping that allow for changes and feedback earlier.
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Comparison of waterfall model and prototype model
The document compares the waterfall model and prototype model of software development. The waterfall model is a sequential process with distinct phases from conception to maintenance. It is simple but inflexible. The prototype model builds throwaway prototypes to understand requirements, allowing for user feedback and flexibility but potentially increasing complexity. Each model suits different types of projects based on requirements certainty, resources, and need for user interaction.
Spiral Model
The spiral model combines elements of the prototype and waterfall models. It involves iterating through phases of planning, risk analysis, engineering, and customer evaluation. The model aims to identify and mitigate risks early through prototyping. Key advantages include risk avoidance and the ability to add functionality later, though it can be costly due to extensive risk analysis needs.
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This document compares the waterfall, V-model, and spiral software development models. It describes the key phases and characteristics of each model. The waterfall model is a linear sequential process where each phase must be completed before the next begins. The V-model is similar but adds testing at each phase. The spiral model is iterative with risk analysis and prototyping at each loop. The document discusses the pros and cons of each approach, concluding that the waterfall model is best for known requirements, the V-model for smaller projects, and the spiral model for large projects requiring extensive risk analysis.
Waterfall model
A waterfall model is a sequential design process, used in software development processes, in which progress is seen as flowing steadily downwards( like a waterfall) through the phrases of Conception, Initiation, Analysis, Design, Construction, Testing, Production/Implementation, and Maintenance.
The waterfall development model originates in the manufacturing and construction industries which are highly structured physical environments in which after-the-fact changes are prohibitively costly, if not impossible. Since no formal software development methodologies existed at the time, this hardware-oriented model was simply adapted for software development.
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The document compares the waterfall model and prototype model of software development. The waterfall model is a sequential process with distinct phases from conception to maintenance. It is simple but inflexible. The prototype model builds throwaway prototypes to understand requirements, allowing for user feedback and flexibility but potentially increasing complexity. Each model suits different types of projects based on requirements certainty, resources, and need for user interaction.
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Incremental model
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Waterfall model
A waterfall model is a sequential design process, used in software development processes, in which progress is seen as flowing steadily downwards( like a waterfall) through the phrases of Conception, Initiation, Analysis, Design, Construction, Testing, Production/Implementation, and Maintenance.
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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.
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Waterfall model
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.
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The document describes the waterfall model of software development. It begins by listing the presenters and defining sequential and incremental software development models. It then discusses the waterfall model in more detail, describing it as a linear sequential process where each phase must be completed before the next begins. The document outlines the history, use cases, diagram, phases and advantages/disadvantages of the waterfall model.
Prototype model
The document discusses the prototyping model of software development. It describes prototyping as building a toy or crude initial version of the software to get early user feedback before developing the actual system. The key steps are requirements gathering, quick design, building the prototype, user evaluation and refinement, then iterative development and engineering of the final product. Advantages include early user assessment, gaining insight, and clarifying requirements. Disadvantages include the potential for increased time/costs if multiple prototypes are needed and losing focus on quality.
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Waterfall model
The Waterfall model is a sequential development process where progress flows in one direction like a waterfall from conception to maintenance. It works best for projects with stable requirements over a short duration, as documentation and milestones are clearly defined at each stage from requirements to testing. However, the Waterfall model is not suitable for projects where requirements may change, as it is difficult to measure progress or make changes without restarting the entire process, and testing only occurs late.
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Agile life cycle models
The document discusses the Agile development model. It defines Agile as an incremental model where each release is tested to ensure software quality. It notes that Agile is used for time critical applications and when new changes are needed. The advantages of Agile include customer satisfaction, frequent delivery of working software, and responsiveness to change. However, disadvantages include lack of documentation and potential loss of focus without a clear customer representative.
Waterfall and spiral model
The Waterfall model is a sequential software development process that was first introduced by Winston Royce in 1970. It involves analyzing requirements, designing, implementing, testing, integrating, and maintaining software in distinct phases where each phase depends on the deliverables of the previous one. While it provides structure, works well for quality-focused projects, and requires all requirements upfront, it is rigid and doesn't allow for changes late in the process.
Waterfall
The waterfall model is a sequential software development model where progress flows in one direction like a waterfall from conception to maintenance. It involves 6 phases - definition/analysis, basic design, technical design, construction, testing, and integration/maintenance. The waterfall model is easy to use but inflexible to changes in requirements, which is a common occurrence. It assumes requirements will not change once the process begins.
Prototype model
The document discusses the prototype model of software development. It notes some disadvantages of traditional sequential models, including that requirements often change and freezing designs early is not suitable for long-term projects. The prototype model involves building a working prototype to test the process early, get user feedback, and refine requirements before full development. This allows errors and missing functionality to be identified earlier. While it can be a slower process with more client involvement, it provides a better understanding of the system and reduces time needed after finalizing requirements.
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The document discusses the Agile software development model. It states that Agile is an iterative and incremental process where the entire application is divided into modules, with each module developed, tested, and implemented separately to obtain customer feedback. Some key Agile principles mentioned include adaptive planning, frequent delivery of working software, customer collaboration, and responding to changing requirements. The document also compares Agile to traditional models like waterfall, noting that Agile uses adaptive development and close customer interaction, while traditional models rely more on upfront planning and documentation.
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The document discusses the waterfall model of software development. The waterfall model is a linear and sequential approach where each phase must be completed before the next begins, with no overlapping phases. The phases are requirements, design, implementation, verification, and maintenance. While simple and easy to understand, the waterfall model is not suitable for complex or long-term projects where requirements may change, as it does not allow for much revision between phases.
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The document discusses four common software development life cycle (SDLC) models: Waterfall, V-Model, Spiral Model, and Agile Model. It provides details on the phases and processes of the Waterfall and V-Model, and highlights some advantages and disadvantages of each. For the Spiral Model, it notes that the lifecycle is divided into iterative parts to manage risk and add new features incrementally. Finally, it states that the Agile Model uses iterative and incremental development with a focus on adaptability and rapid delivery.
Softeng
The document discusses various software development life cycle models. It describes the iterative and incremental model in detail, noting that it involves developing the software in increments with each increment applying the classical waterfall phases of requirements, analysis, design, implementation and testing on a portion of the software. Each iteration can be viewed as a small waterfall model. The model allows for risks to be addressed early and working versions to be delivered frequently for feedback. Other models discussed include waterfall, rapid prototyping, agile processes, synchronize-and-stabilize and spiral. The document concludes no single model is best and a hybrid approach may be most effective.
Software Process Model.ppt
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
IT Software Development Life Cycle
-SDLC Model
-Waterfall Model
-Strengths & Weaknesses of Waterfall Model
-V-shaped Model
-Strengths & Weaknesses of V-shapedl Model
Waterfall model and spiral model
The document discusses two software development life cycle (SDLC) models: the waterfall model and the spiral model. The waterfall model is a sequential design process where each phase must be completed before the next can begin. It is simple but not suitable for complex or long-term projects where requirements may change. The spiral model is an iterative approach that allows for incremental releases and refinement through each cycle. It focuses on risk evaluation and is well-suited to large, expensive projects with changing needs.
Waterfall model
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.
Employee Management Process (Engineering Model)
Main goal of this practical is to finalize the Design and Implementation model from the different Software Engineering Models.
System designs and types of System Designs
The document discusses three software development models: the Waterfall model, the Spiral model, and the Incremental model. The Waterfall model is a linear sequential process where each phase must be completed before the next begins. The Spiral model is an iterative process combining prototyping and waterfall elements. Each cycle determines requirements and manages risks. The Incremental model is an iterative enhancement of the waterfall model where the project is developed in small increments with each phase producing an increment.
Software development life cycle
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.
2-SE Process Models.pptx
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
Structured system analysis and design
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.
Sdlc models
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.
Waterfall Model
The document discusses the waterfall model of software development. It describes the waterfall model as a linear sequential approach where progress flows from one phase to the next like a waterfall. The key phases are requirement analysis, design, development, testing, deployment, and maintenance. Each phase has distinct requirements and activities. The waterfall model works well for smaller, well-defined projects but has disadvantages for complex projects where requirements may change.
Models in project management_Agile and Waterfall
The document discusses two common project management methodologies: the waterfall model and the agile model. The waterfall model is a traditional, linear approach where each phase must be completed sequentially before moving to the next. In contrast, the agile model is an iterative approach that values adaptability and customer feedback, with developers working in short sprints and requirements evolving throughout the project. The document compares the two methods, noting waterfall is best for smaller, well-defined projects while agile handles more unpredictable projects through a flexible adaptive approach.
ISTQB - Software development life cycle
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.
Models of SDLC (Software Development Life Cycle / Program Development Life Cy...
Models of SDLC (Software Development Life Cycle / Program Development Life Cy...Amity University | FMS - DU | IMT | Stratford University | KKMI International Institute | AIMA | DTU
Software Lifecycle Models / Software Development Models
Types of Software development models
Waterfall Model
Features of Waterfall Model
Phase of Waterfall Model
Prototype Model
Advantages of Prototype Model
Disadvantages of Prototype model
V Model
Advantages of V-model
Disadvantages of V-model
When to use the V-model
Incremental Model
ITERATIVE AND INCREMENTAL DEVELOPMENT
INCREMENTAL MODEL LIFE CYCLE
When to use the Incremental model
Rapid Application Development RAD Model
phases in the rapid application development (RAD) model
Advantages of the RAD model
Disadvantages of RAD model
When to use RAD model
Agile Model
Advantages of Agile model
Disadvantages of Agile model
When to use Agile model
Waterfall-Model-in-SDLC-8861433.ppsx.pdf
The document discusses the waterfall model of the software development life cycle (SDLC). The waterfall model is a linear and sequential approach where each phase must be completed before the next begins, with phases including requirements, design, implementation, verification, and maintenance. It is simple to understand but inflexible and not suitable for complex or long-term projects where requirements may change.
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Models of SDLC (Software Development Life Cycle / Program Development Life Cy...
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Waterfall and Prototype model
- 1. PRESENTED BY - JITENDRA SINGH RATHOUR WATERFALL AND PROTOTYPE MODEL
- 2. WATERFALL MODEL • The waterfall model is the traditional lifecycle model in which the lifecycle phases are executed in a sequential manner. • Requirement Analysis • Design • Development • Testing • Deployment • Maintenance
- 3. CHARACTERISTICS- 1. The phases organized in a downward linear sequence. 2. There is a downward flow of information. 3. Each phase has a defined start point and end point. 4. The phases do not overlap with each other. 5. Each phase handled by a specific set of people.
- 4. ADVANTAGES - • The model is simple to understand and easy to use. • The model has clearly defined phases. • The model is easy to use. DISADVANTAGE- • This model does not provide any scope for changes.
- 5. WHERE TO USE- • The Waterfall model works well in situation where requirements are well understood and not likely to change.
- 6. PROTOTYPE MODEL • A prototype is a sample implementation of the system . It provides limited and main functional capabilities of the proposed system.
- 8. VARIANTS OF PROTOTYPING • ThrowAway Prototyping • Evolutionary Prototyping • Incremental Prototyping
- 9. ADVANTAGES • User requirements become clear to developer. • Changes are only done at design phase. • The time of development is reduced. • The costs are reduced.
- 10. DISADVANTAGES • It gives false impression to customer. • Compromise on the overall quality of the software. • Cost of the software development may increase. • The developer can get attached to the prototypes that they have developed.