In the course of software development, the requirements
often change significantly. Based on the analysis of
software requirement variations, we introduce a new
approach to measurement of requirement changes based on
the six-sigma methods. The framework of GQM
(Goal-Question-Metric) and the process of DMAIC
(Define-Measurement-Analysis- Improvement-Control) in
six-sigma were combined for application in the
management of software projects. The change metrics are
presented based on GQM, and the requirement changes are
classified according to their effect in project quality.
Further, statistical methods were used in the analysis and
the control of these requirement changes. Finally, we
illustrate our approach with a business case.
Key words: Software metrics, Six-sigma, GQM