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* Rebate回扣 * This is expressed as the the likelihood that the distributor will not stock out during lead time * Normally distributed,正态分布, This is expressed as the the likelihood that the distributor will not stock out during lead time.这可以由在订货提前期内分销商不会断货的概率表示 * Z: 安全系统 * Suppose the distributor of the TV sets is trying to set inventory policies at the warehouse for one of the TV models. The data have been provided on the number of TV sets sold . Every time the warehouse places an order to the manufacturer, replenishment time(I.e.,lead time) is about two weeks. The distributor would like to ensure that service level is about 97%. Assuming there is no fixed ordering cost, what is the order-up-to-level that the distributor should use? The average monthly demand is 191.17 and the standard deviation of monthly demand is 66.53. Since lead time is two weeks, we transform the average and the standard deviation to weekly values as follows: Average weekly demand=(Average monthly demand)/4.3 While Standard deviation of weekly demand=Monthly standard deviation/sqrt(4.3) We calculate average demand during lead time and safety stock using a constant Z=1.9. The reorder point is simply the sum of the average demand during lead time plus the safety stock. The order-up-to-level is equal to 855. The distributor needs to keep about four weeks’ worth of inventory at the warehouse and in the pipeline. * Suppose the distributor of the TV sets is trying to set inventory policies at the warehouse for one of the TV models. The data have been provided on the number of TV sets sold . Every time the warehouse places an order to the manufacturer, replenishment time(I.e.,lead time) is about two weeks. The distributor would like to ensure that service level is about 97%. Assuming there is no fixed ordering cost, what is the order-up-to-level that the distributor should use? The average monthly demand is 191.17 and the standard deviation of monthly demand is 66.53. Since lead time is two week
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