Testing a Requirements Pattern Language through Reverse Engineering

摘要

This paper looks at a case study to reverse engineer an IT system that supports thernHealth and Safety Executive in making planning recommendations with respect to hazardousrninstallations. It compares a Use Case model created from a requirements specification with a UsernCase model derived from an inspection of the built system. The objective is to discover howrnaccurately the final system could be predicted using a series of requirements patterns. Throughrnthe application of requirements patterns, it was possible to predict the functionality delivered to arnhigh degree, which suggests this is a useful contribution to the prediction of functionality andrnthereby to system sizing. This work is part of a bigger project for the Health and SafetyrnExecutive investigating improvements to system sizing/effort estimation and its impact on thernmanagement of complexity.