Abstract: On the basis of the failure data of assemble machine tools made in China from one type of automobile cylinder processing line, a failure correlation analysis is conducted based on decision-making laboratory analysis (DEMATEL) and interpretive structure model (ISM). First, degree of association by DEMATEL is calculated, and correlation and all relationships of correlative fault and determined correlation sort of related fault subsystems are analyzed. Next, a hierarchical structure model is constructed based on ISM, which can confirm the interrelationship of related fault subsystems and logical structure. By realizing the structured and hierarchical structure of  fault systems, the basis for fault diagnosis and fault location are provided.

Key words: modular machine tool, DEMATEL/ISM, related failure analysis