While the Iterative Model addresses many of the problems associated with the Waterfall Model, it does present new challenges.
The user community needs to be actively involved throughout the project. While this involvement is a positive for the project, it is demanding on the time of the staff and can add project delay.
Communication and coordination skills take center stage in project development.
Informal requests for improvement after each phase may lead to confusion -- a controlled mechanism for handling substantive requests needs to be developed.
The Iterative Model can lead to "scope creep," since user feedback following each phase may lead to increased customer demands. As users see the system develop, they may realize the potential of other system capabilities which would enhance their work.
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