I have received many comments from practitioners who read about the RUP and become excited at the prospect of implementing it on their own projects. Indeed, it seems like applied common sense. Yet situations seem to occur that derail many people attempting RUP, especially for the first time.
Applying the RUP is not always intuitively obviouscertainly it's less so than traditional Waterfall processes. Most of the difficulties organizations experience with implementing the RUP center on the correct use of iterative development. Many organizations struggle with this. By examining some of the mistakes organizations make when applying the RUP, you can take steps to avoid them. Although it is not possible to cover every conceivable way things can go wrong, this appendix explores the more common ones. The scenarios covered in this appendix are situations I have encountered working as a consultant.