Waterfall Model

Hi

Please State
What are the advantages and disadvantages of Waterfall model?

Thanks
Srik

In Waterfall model every phase is implemented in a sequential order.

Waterfall model is suitable when the specification and requirements are clearly stated and the project is smaller in size.

In a Waterfall model the output of one phase forms the input of the next phase.

This concept actually turn as its disadvantage i.e., whe a mistake occurs in a particular phase, the same mistakes gets carried over to the last phase.

Waterfall model is time intensive process and almost provides little or no option to change user requirements.

Advantage:
Waterfall model is used where the duration of project is very less,and it is best for small projects.
Disadvantage:
This model is useful only when the requirements are freezed(or not changing).

verification and validation

Advantages of Waterfall Model:
1. Because of availability of well-defined outputs at each stage, the progress of the project will be evident to the management
2. Project monitoring is easy because of the visible outputs at each stage
3. As it is a simple model, it is followed in a large number of organization, particularly for commercial projects
4. This is suitable for short duration project
5. No rework and result is high quality product

Disadvantages of Waterfall Model:
1. Not suitable for change driven project
2. Not suitable for large project
3. Its uniform and steps are sequence
4. For change driven project, Modified Waterfall Model is used