Generating Scenarios with Access Permission from a Conceptual Model

There are methods to cope with the incompleteness of requirements. This paper proposes a conceptual model based method to generate scenarios. The method assumes that the unfriendliness of systems comes from the gap between the operational model and the mental model of users. The operational model can be represented in use case models or users' scenarios. Our method applies a conceptual model with class diagrams as a part of the mental model of users. We also develop a tool as a bridge between these models. It automatically generates users' scenarios from the conceptual model with access permissions. In order to evaluate the effectiveness of the method, we study a case and clarify whether the method and the tool contribute to the improvement of the completeness of requirements. The case focused on is a system of a domain of academic affairs of the Open University of Japan. As the result, the tool implemented could generate new scenarios that have not been implemented within the system.