Ergonomics Evaluation of Virtual Maintenance Process Based on Fuzzy and AHP Method

Product maintainability is an inherent property, which is formed in the product design stage and is demonstrated through later use. Ergonomics is an important aspect of the maintenance. In this paper, virtual maintenance process was modeled according to actual maintenance process, and ergonomic factors, which affected maintenance process, was analyzed in terms of reachability, operation space, visibility and comfort. Analytic hierarchy process (AHP) method was utilized to assign a weight to each factor, and virtual maintenance process was evaluated by fuzzy comprehensive method. Finally, this method was applied and verified by installation of return module oxygenation wrench, through evaluating virtual maintenance process. Some potential ergonomic issues can be found and dealt earlier in the maintainability design of complex equipment.