The Micro-Scenario Method (MSM) is an approach to uncover the consumer needs and establish the development concepts [2]. In this study, the MSM is applied to the Information Support System for Safety related to a motorcycle and devised for application efficiency. What is devised is to make a prescriptive model up before interview research and set up the syntax rules of the problem-scenario (a description sentence of problem situation). As a result, the development efficiency is improved by the modified MSM. The communication of relevant parties can be speeded up, because the prescriptive model which keywords are structurally organized helps development actors share wide-ranging information about problem situations. Moreover, the creation time of problem-scenario can be cut, because the syntax rule of problem-scenario simplifies how to describe it. Though the modified MSM is an effort to take MSM in practical use at YAMAHA Motor Company Ltd. (YMC), the modified MSM was considered as a useful approach to reduce the workload of HCD (Human-Centred Design).