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Any engineering design project faces various types of uncertainties. They cause risk that a project goal cannot be accomplished within lead time. A design project manager should identify potential risk factors and causal relations among them in a project. Although it is worthwhile to spend much time on a workshop for project members to understand unnoticed risks, it is often a hard job to identify risk factors and causal relations in a mutually exclusive and collectively exhaustive way. This paper proposes a risk identification method based on a framework schematizing a fundamental model of a risk chain mechanism in an engineering design project in order to support a project manager and project members to systematically identify potential risk factors and causal relations among them. A proposed method provides categories of typical risk factors in an engineering design project. A typical chain mechanism among those categories is also defined. Those elements in a fundamental model can facilitate a project manager and project members to find unnoticed factors in a project. A case study of a risk workshop for a student formula car design project is demonstrated to show that the proposed method facilitates project members to understand potential risk factors and to build a comprehensive risk chain model. 1. 緒 言 機械製品の多くは,様々な分野の専門家の協調作業による設計開発プロジェクトを通じて生み出される.設計 プロジェクトは,従来にない,何らかの面において新規性を持つ製品を生み出す活動であるため,その進捗には 不確実性を伴う多くの要因が複雑に関連している.そのことが,プロジェクトの最終成果に深刻な影響を及ぼす かもしれない潜在的なリスクの原因となっている.リスク要因はしばしばプロジェクトの初期段階に存在してい るものの,プロジェクトに先立ってあらかじめ特定しておくのは困難であ る.また,プロジェクトがある程度進 行して,リスクが顕在化した後も,その要因を特定することは困難である.そのことがプロジェクトマネジメン

Risk identification of engineering design project based on fundamental model of risk chain mechanism