books.google.comhttp://books.google.com/books/about/Foundations_of_informing_science.html?id=3qtlYfQut1wC&utm_source=gb-gplus-shareFoundations of informing science
Chapter 7 on Task Complexity provides a brilliant synthesis on the subject. The remaining chapters are equally well researched. Saviour (Steve) M. Filletti.
Peter Bednar suggested that Chapter 13 "Use and Redesign of Informing Systems: Lessons to Learn from Philosophizing and Practicing" by Hans-Erik Nissen, is really worth reading.