The Research And Quantitative Evaluation Of Uncertainty Factors In The Scheduling

Shop scheduling is the core of production management in the manufacture system, implement and complement successfully of production management tasks are ensured depending on logical scheduling. During the actual scheduling implement, some unexpected uncertainty factors always occur, which make normal scheduling affected, so it will lead to some unexpected results. Therefore, it's necessary to analyze uncertainty factors in the scheduling. Concrete contents of paper are summarized as follows:(1) Beginning from the definition of scheduling, analyze systemically research actual actuality and development trendy of scheduling. On the basis of it, narrate detailed research actuality of scheduling under the uncertainty condition. Meanwhile, introduce reliability definition and research actuality in many fields.(2) For the mechanical parts manufacture enterprises, analyze deeply all kinds of uncertainty factors during scheduling, research detailed production type of mechanical manufacture and scheduling characteristic of every type. While researching these uncertainty factors affect scheduling, adopt probability statistic theory, fuzzy math method, reliability theory, equipment maintenance theory and human-mechanics engineering, establish separately human, manufacture equipment, production tasks, time and out-assistant quantitative evaluation model, so quantify the influence degree that the stochastic factors acting on production scheduling.(3) Aiming at the characteristic that manufacture equipment is typical of MaErKeFu course, get instantaneous availability degree and steady availability degree under work condition and stop condition on the course of scheduling, establish maintenance model of scheduling course. For the human uncertainty factor, analyze the reason and sort of human misplay.(4) Aiming at the uncertainty factors, integrate actual scheduling system, analyze that how to input and manage these uncertainty factors during system's arranging plan and scheduling, do actual analysis and discussion.