Software Estimation: Demystifying the Black Art

Chapter 13. Expert Judgment in Groups

Applicability of Techniques in This Chapter

	Group Reviews	Wideband Delphi
What’s estimated	Size, Effort, Schedule, Features	Size, Effort, Schedule, Features
Size of project	- M L	- M L
Development stage	Early–Middle	Early
Iterative or sequential	Both	Sequential
Accuracy possible	Medium	Medium

Group expert judgment techniques are useful when estimating early in a project or for estimating large unknowns. This chapter presents an unstructured group judgment technique (group reviews) and a structured technique called Wideband Delphi.

Group Reviews

A simple technique for improving the accuracy of estimates created by individuals is to have a group review the estimates. When I have groups review estimates, I require three ...