Experience with Goal-Scenario Coupling in Requirements Engineering

International audienceIn the context of Requirements Engineering (RE), both goal-driven approaches and scenario-based approaches have proven useful for eliciting, justifying and validating system requirements. In order to overcome some of the deficiencies and limitations of these approaches when used in isolation, proposals have been made to couple goals and scenarios together. The CREWS -L'Ecritoire approach advocates for a bi-directional coupling allowing movement from goals and scenarios and vice-versa. The paper reports on an experimentation of the CREWS-L'Ecritoire approach on a large scale business process re-engineering project conducted in the context of an electricity supply and distribution company. The focus is on a set of issues that we found important and that we believe are not specific to our approach. We considered three kinds of issues, those which are found in goal-driven approaches, those in scenario-based approaches, and those specific to goal-scenario coupling. In this paper, we devote a specific attention to the third kind of issues and assess the extent to which the goal-scenario coupling helps to resolve the first two kinds of issues