Getting a Count: Recording Metrics in Documentation Plans 
Most large documentation departments are already using some kind of a formal documentation project planning strategy. Many are modeled after the work of Dr. JoAnn Hackos, with information plans, content specifications, and/or documentation plans (Hackos, 1994) 1 . By carefully adjusting the look and feel of the planning documents, adding room for recording actual numbers at the completion of the project, managers can implement a metrics strategy that takes advantage of existing templates and piggy-backs on existing archiving and checkout procedures.
Romaine, Garret H. STC Proceedings (1999). Articles>Documentation>Project Management