Iterative Waterfall Model is the extension of the Waterfall model.
This model is almost same as the waterfall model except some modifications are made to improve the performance of the software development.
The iterative waterfall model provides customer’s feedback paths from each phase to its previous phases.
There is no feedback path provided for feasibility study phase, so if any change is required in that phase then iterative model doesn’t have scope for modification or making corrections.
Iterative waterfall allows to go back on the previous phase and change the requirements and some modification can done if necessary.
This model reduces the developer’s effort and time required to detect and correct the errors.
In iterative waterfall model, next phase can only begins when the previous phase is completed as waterfall model.
Advantages of Iterative Waterfall Model :-
Iterative waterfall model is very easy to understand and use.
Every phase contains feedback path to its previous phase.
This is an simple to make changes or any modifications at any phase.
By using this model, developer can completer project earlier.
Customer involvement is not required during the software development.
This model is suitable for large and complex projects.
Disadvantages of Iterative Waterfall Model :-
There is no feedback path for feasibility study phase.
This model is not suitable if requirements are not clear.
It can be more costly.
There is no process for risk handling.
Customer can view the final project. there is no prototype for taking customer reviews.
This model does not work well for short projects.
If modifications are required repeatedly then it can be more complex projects.
