Question
The Waterfall Model is a linear approach to project management, where each phase of the project is completed before moving on to the next. This makes it difficult to make changes to previous phases because once a phase is completed, it's generally considered final and not revisited. If a change or error is discovered later on, it can be costly and time-consuming to go back and modify a completed phase. This is why the Waterfall Model is often criticized for its lack of flexibility.
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The Waterfall Model is not an ideal model for large size projects. If the requirements are not understood at the beginning, the method is ineffective. The Waterfall Model makes it difficult to make changes in the previous phases. In the Waterfall Model, the testing process starts as soon as the development is completed. Thus, the chances of discovering bugs in the development that are expensive to fix are higher.
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