关键词: 产出率, 提前期, 采购&mdash, 生产, 学习效应, 遗忘效应, 库存

Abstract: To study the influence of dynamic change of output rate and lead time on purchasing production decision,a decision model of joint optimization of procurement and production is established.The existing of learning and forgetting effect in the production process makes the output rate change dynamically.By using the learning and forgetting theory to simulate the dynamic change process.For the frequent ordering process,lead time compression decreasing regularly,by using the White learning curve to simulate the dynamicly declining process.In this paper,the buyer,OEM supplier and the cost model under centralized decision are established.It is proved that the lead time cost is an increasing function of the elastic coefficient of the lead time.Also,the solution of the optimal solution of the model is given.Numerical analysis results show that when completely forgotten time is short,after the early learning effect stage,the forgetting effects play a more important role than the learning effect;the longer completely forgotten time,the smaller average cost;With the increase of the leaning coefficient of productivity,the average cost shows a changing trend of a hyperbola characteristic.With the increase of dynamic lead time factor,the average cost shows a changing trend of exponential form.

Key words: productivity, lead time, procurement-production, learning effect, forgetting effect, inventory