A Discussion on QFD and Guide-Words in Analysis of Unexpected Obstacles in Embedded Systems

組込みソフトウェアの開発においては,システムの障害などを処理する非正常系が,開発規模の約7割を占めている.筆者らが既に提案している組込みソフトウェアの非正常系分析手法において,HAZOP(Hazard and Operability Study)のガイドワードは重要な役割を持っている.しかし,ガイドワードの体系は,未整理である.そこで,本稿は,要求された品質とその品質を実現するための機能の関係を示すQFD(Quality Function Deployment)と,ガイドワードの関係を考察する.In the development of embedded software, about 70% of the source code of the embedded software is generally allocated to handling unexpected obstacles such as system failure. The authors already proposed an analysis method of unexpected obstacles in embedded systems. The guide-words of HAZOP (Hazard and Operability Study) have an important role in the analysis method. However, the guide-words have not yet been studied satisfactorily. Therefore, this paper dicusses the relationship between the guide-words and QFD (Quaity Function Deployment) which relates the system quality to the function implementing the quality.知能ソフトウェア工学研究会（KBSE), 2008年11月27-28日, 福岡市東区, 福岡県, 日