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变质品生产过程,可能率先出现“次品”的不稳定生产情形,随后机器崩坍;生产状态稳定性迁移时机、机器崩坍时间、维修时间皆乃随机变量;同时,企业无法观测当期需求,只能根据前期需求而随机地安排启动生产时刻.理论模型及数值算例皆表明,此种情况下,企业可以非等周期生产,存在组织生产次数(N)与生产率(P)的优解.敏感度分析看出,当需求拖后率增加、变质率+次品率降低时,企业成本显著降低,但首期生产启动时刻、生产率几乎没有变化.
The production process of the deteriorated products may lead to the unstable production situation of “defective ”, then the machine collapses; the production state stability migration opportunity, the machine collapse time and the maintenance time are all random variables; at the same time, the enterprise can not observe the current demand, The start-up time can only be arranged randomly according to the demand in the early stage.The theoretical model and the numerical examples all show that in this case, the enterprise can produce non-equal cycle and have the optimal solution of the number of production (N) and the productivity (P). Sensitivity analysis shows that when the demand drag rate increases, the rate of deterioration + defective rate, the business costs significantly reduced, but the first phase of production starts, almost no change in productivity.