Scenario Patterns Based on Case Grammar Approach

Scenario-based approach is one of the promising techniques not only to elicit requirements from stakeholders, but also to achieve user-participatory development. The techniques to construct scenarios of high quality with less effort are necessary. In addition, since during developing a system its requirements are frequently changed by customers and/or users, the techniques to manage the changes to the scenarios and to handle the change propagations on the scenarios are also crucial ones. This paper proposes a solution to the above issues based on reusable pattern techniques and case grammar of natural-language processing techniques. We abstract case frames as reusable primitive parts to write sentences in a scenario and patterns to combine the case frames so that we can get consistent scenario episodes.