Enrique Simpson | : Paul H. Nitze School of Advanced Studies (SAIS), Johns Hopkins University, Washington DC (original) (raw)
Uploads
Papers by Enrique Simpson
成都虹波实业股份有限公司在新的企业制度下,加快技改速度,适时调整产品结构,以适应市场经济需要。到目前为止,该公司预计投资2200万元,而实际投资仅2000万元的"八五"技术改... more 成都虹波实业股份有限公司在新的企业制度下,加快技改速度,适时调整产品结构,以适应市场经济需要。到目前为止,该公司预计投资2200万元,而实际投资仅2000万元的"八五"技术改造项目——粗钨丝扩产技改工程已基本完
RAIRO - Operations Research, 2021
This paper analyzes the performance of α L service measure, defined as the probability that stoc... more This paper analyzes the performance of α L service measure, defined as the probability that stockouts do not occur during a replenishment cycle, to cover different aspects of stock shortages when used to design an optimal continuous review (Q,r) policy. We show that explicitly controlling the frequency of replenishment cycle stockouts, using the α L service-level, allows to implicitly control the size of the stockouts at an arbitrary time, the size of accumulated backorders at an arbitrary time, and the duration of the replenishment cycle stockouts. However, the cost of controlling the frequency of replenishment cycle stockouts is greater than the cost of controlling the size of stockouts and the duration of the replenishment cycle stockouts.
成都虹波实业股份有限公司在新的企业制度下,加快技改速度,适时调整产品结构,以适应市场经济需要。到目前为止,该公司预计投资2200万元,而实际投资仅2000万元的"八五"技术改... more 成都虹波实业股份有限公司在新的企业制度下,加快技改速度,适时调整产品结构,以适应市场经济需要。到目前为止,该公司预计投资2200万元,而实际投资仅2000万元的"八五"技术改造项目——粗钨丝扩产技改工程已基本完
RAIRO - Operations Research, 2021
This paper analyzes the performance of α L service measure, defined as the probability that stoc... more This paper analyzes the performance of α L service measure, defined as the probability that stockouts do not occur during a replenishment cycle, to cover different aspects of stock shortages when used to design an optimal continuous review (Q,r) policy. We show that explicitly controlling the frequency of replenishment cycle stockouts, using the α L service-level, allows to implicitly control the size of the stockouts at an arbitrary time, the size of accumulated backorders at an arbitrary time, and the duration of the replenishment cycle stockouts. However, the cost of controlling the frequency of replenishment cycle stockouts is greater than the cost of controlling the size of stockouts and the duration of the replenishment cycle stockouts.