A method for requirements elicitation and consensus-building for ideas in the vehicle system concept design using GSN

In V-process, ideas for a new system are repeatedly verified in an agile way using Model Based Development (MBD) in the early stages of a system development. Although verifying those ideas through simulations and/or in-depth analysis by writing detailed requirements specifications is possible, it is unrealistic due to difficulty of understanding relations among functions, and the development cost. In our preliminary experiment, we first construct abstract models and verify given ideas through those models. However, we find that the cost of preparing requirements specification documents and building consensus with the system concept designers and the model designers require considerable cost. To overcome the issue, we propose a requirements elicitation method using Goal Strucuturing Notations (GSN). We apply the proposed method to three automotive-domain system development projects. As a result, the cost of preparing requirement specification documents can be reduced compared to the conventional methods.