waterfall and prototype model
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PRESENTED BY - JITENDRA SINGH RATHOUR
WATERFALL AND PROTOTYPE MODEL
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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
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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.
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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.
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WHERE TO USE-
• The Waterfall model works well in situation where requirements are well understood and not likely to change.
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PROTOTYPE MODEL• A prototype is a sample implementation of the system . It provides
limited and main functional capabilities of the proposed system.
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PROTOTYPE MODEL
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VARIANTS OF PROTOTYPING
• ThrowAway Prototyping
• Evolutionary Prototyping
• Incremental Prototyping
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ADVANTAGES
• User requirements become clear to developer.
• Changes are only done at design phase.
• The time of development is reduced.
• The costs are reduced.
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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.