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.

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.

7. PROTOTYPE MODEL

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.