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首页> 外文期刊>International Journal of Production Research >Effect of rework, rejects and inspection on lot size with work-in-process inventory
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Effect of rework, rejects and inspection on lot size with work-in-process inventory

机译：返工，废品和检验对在制品库存的批量的影响

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摘要

The economic order quantity and economic production quantity models are the most commonly used inventory models in production environments for the calculation of optimum lot size. However, these models are based on the unrealistic assumption that every process produces good quality products every time. Moreover, the impact of inspection is neglected in all extended inventory control models involving work in process inventory. By taking both imperfect production and lot size inspection into consideration, this paper presents a more realistic approach for the modelling of optimum lot size and total cost with a focus on the work in process inventory. A mathematical model is derived for optimum lot size based on the minimisation of the average cost. Our approach incorporates the effect of rework, rejects and inspection on work in process inventory. The significant effect of imperfect production and inspection on optimum lot size is evaluated via numerical examples. In comparison to existing models, the proposed model is a more generalised and flexible form of inventory model for independent demands.
机译：经济订单数量和经济生产数量模型是生产环境中最常用的库存模型，用于计算最佳批量。但是，这些模型基于不现实的假设，即每个过程每次都会生产出高质量的产品。此外，在涉及过程库存工作的所有扩展库存控制模型中，忽略了检查的影响。通过兼顾不完美的生产和批量检查，本文提出了一种更现实的方法，用于建模最佳批量和总成本，重点是过程库存中的工作。基于平均成本的最小化，得出了用于最佳手数的数学模型。我们的方法结合了返工，废品和检查对流程中库存工作的影响。通过数值示例评估了生产和检验不完善对最佳手数的重大影响。与现有模型相比，所提出的模型是针对独立需求的更通用和灵活的库存模型。

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