Maintenance decision of meta-action unit based on Grey-BWM

Abstract In order to reduce the maintenance cost, improve availability, reliability, safety and product quality of equipment, it is necessary maintain equipment. The choice strategy not only related economic interests, even endanger personal safety. Traditional decision-making often takes parts or whole system as decision object. Taking components systems objects, too large grains are easy lead wrong decisions, resulting in over repair under repair; taking analysis complicated. this paper, meta-action unit taken research carrier, grey weight each criteria obtained by combining theory with best worst method (BWM). comprehensive value evaluation calculated number algorithm its comparison method, scheme comparison. example proves effectiveness method.