A Characterization of Negative User Stories

In the context of an agile project, negative interactions are addressed by equipping the ‘conventional’ positive user story engineering process with a number of conceptual models, including those for negative user story and negative role. The challenges inherent in eliciting negative uses, negative roles, and negative user stories are highlighted. The cost of engineering negative user stories is analyzed. The relationships among positive and negative user stories are considered. For illustration, a detailed example is presented. Keywords-agile methodologies; conceptual modeling; requirements engineering; risk management; security engineering; socio-technical distributed systems