物料流瓶颈对制造车间不确定环境的敏感性研究

Sensitivity of Material-flow Bottleneck to Uncertain Environment in Job Shop

摘要:

提出了物料流瓶颈对瓶颈漂移因素的敏感性度量方法。通过定义物料流瓶颈，从生产速率和生产质量两个方面综合度量制造单元生产能力和需求，并提出物料流瓶颈指数用于表征制造单元阻碍制造车间物料流流动平顺性的程度（即物料流瓶颈程度）；分显性和隐性瓶颈漂移因素测度制造单元瓶颈指数对各因素的敏感性，并利用DEMATEL方法分析因素间的相互关联关系，在此基础上提出瓶颈漂移敏感指数度量物料流瓶颈对制造车间不确定环境的敏感程度；最后，通过对某一制造车间内物料流瓶颈和瓶颈程度对不确定环境的敏感性的度量和监测，验证了瓶颈指数和瓶颈漂移敏感指数的有效性和实用性。

关键词:物料流;瓶颈漂移;制造车间;敏感指数

Abstract:

The method for measuring the sensitivity of the bottleneck degree to the bottleneck shifting factors was proposed. According to the material-flow bottleneck defining, the production capability and load were described from the perspectives of process speed and quality level, then the bottleneck index was constructed to characterize the degree of manufacturing unit blocking the material-flow (that is bottleneck degree). Based on the measurement of the sensitivity of the bottleneck index to the single bottleneck shifting factor and DEMATEL method for analyzing the relationship of the factors, bottleneck shifting sensitivity index was built to measure the sensitive degree of bottleneck index to the uncertain environment. At the end of this thesis, an example for monitoring the bottleneck and measuring sensitive degree to the uncertain environment in job shop was given to prove the validation and practicability of bottleneck index and bottleneck shifting sensitivity index.

Key words:Material-flow;Bottleneck shifting;Job shop;Sensitivity index