关键词: 再制造, 不确定性, 工艺路线, 图形评审技术

Abstract: With respect to the uncertain remanufacturing process in remanufacturing systems，a Graphical Evaluation and Review Technique (GERT) network based remanufacturing process model was proposed.The uncertainties of remanufacturing process routes were analyzed，parameters were described and four typical remanufacturing process routes were introduced.Then a uncertain remanufacturing process route model for used components was constructed based on GERT network，in which all possible remanufacturing process route for used components were described，and the probable route for each process and time distribution function of every process time were discussed.The probability and expected time of the used components from one node to another in the model were acquired by signal flow graph and moment generating function.The model was applied in remanufacturing of used lathe spindle，and the result was simulated by Arena software to demonstrate the rationality.

Key words: remanufacturing, uncertainty, remanufacturing process route, graphical evaluation and review technique, used components