Planning for Factors That Affect Project Cost
http://www.stc.org/confproceed/1994/PDFs/PG357359.PDF

Fredrickson, Lola and Joyce Lasecke
STC Proceedings
1994

Abstract:

Documentation projects often change to respond to changes or obstacles in the system development process. Sometimes, these changes increase project costs. However, as corporate budgets tighten, project managers are frequently asked to work within their original estimates despite the changes. To minimize these situations, project managers need to identify the factors that can increase the costs of a project, evaluate the chances of problems arising, and adapt the work plan and estimate to anticipate the problems that are outside of their control.