Abstract
In order to assist a designer from the viewpoints of qualities (e.g., reliability), the authors have proposed a concept of design aid based on the concurrent processing of design tasks. This paper describes a system of design aid based on the proposed concept. This system performs fault tree analysis concurrently with the designer's modeling process to assist the designer from the viewpoint of reliability throughout the modeling. In this system, the fault tree analysis is decomposed into subproblems which are concurrently solved as the modeling proceeds. With the concurrent processing, the designer is informed of the information (e.g., malfunction of design object) in terms of the reliability early in the modeling. An example is given to demonstrate the effectiveness of the system.
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