Rule-based verification of scenarios with pre-conditions and post-conditions

Scenarios that describe concrete situations of software operation play an important role in software development, especially in requirements engineering. Since scenarios are informal, the correctness of scenarios is hard to verify. The authors have developed a language for describing scenarios in which simple action traces are embellished. The purposes are to include typed frames based on a simple case grammar of actions and to describe the sequence among events. Based on this scenario language, this paper describes both (1) a correctness-verification method using rules to detect errors (lack of events, extra events, and wrong sequence among events) in a scenario and (2) a retrieval method of rules from rule DB that applicable to scenarios using pre and postconditions.