From Christina Phillips, Project Types in Dynamics GP- Not Always What They Seem. Oh this is so true. In fact, just about everything in Project Accounting requires lots of real listening, lots of explaining, lots of diagramming, and as soon as you get it right, the business changes.
Dynamics GP Land: Project Types in Dynamics GP- Not Always What They Seem
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.