Write Once, Use Many: Why and How We Make Product Information Modular  

Faced with growing demand from customers for specific courses, addressing only their needs, in very short time-frames, we had to re-examine the way we worked. Patching together one-shot customized coursework was labor-intensive for a non-homogeneous and unsatisfactory result. Each new customer request required repetition of the same amount of effort. With reduced turnaround time and dwindling human resources, a solution had to be found.

McClelland, Patricia J. and Alison Bourdel. STC Proceedings (1993). Articles>Documentation>Information Design>User Centered Design