製品開発における実践的なModel Based Systems Engineeringの適用

（ガソリンエンジン吸気計量システムへの適用）

抄録

In this paper, concreate recursion process of Model Based Systems Engineering (MBSE) on vehicle engine development was shown. Engine is defined as 3 layers (unit, system, component) in MBSE process. Unit requirements are decomposed to system requirements, the system requirements are decomposed to component requirements. And these are decomposed to hardware spec and software requirement in component layer, finally. However, in some cases, there are few component options because of some restrictions. For these cases, recursion considering component restrictions is needed in order to prevent rework. In proposed method, component restrictions or preconditions such as accuracy or dynamic range are considered in requirement analysis of systems. In addition, component layer proposes key parameters to system layer by sensitivity analysis based on quality engineering in functional analysis. As a result, huge rework back to unit or system redesign caused by undesired component allocation was prevented.