Consider a periodic review​ system, where orders are placed every 21 days. The firm strives to provide a 94.41% cycle service level. Demand averages 415 units per​ day, and the standard deviation of demand per day is 107 units. Lead time is 10 days​ (round Z-values, standard deviations to two decimal​ places).   a. How many units of safety stock should be​ held?   units​ (round your response to the nearest​ integer).   b. What should the target inventory level​ (order-up-to level)​ be?   units​ (round your response to the nearest​ integer).   c. Suppose that it is time to review the item. There are 158 units in​ inventory, and there is an outstanding backorder for 472 units. An order for 113 units is on the way. How many units should be ordered​ now?   units​ (round your response to the nearest​ integer).

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Consider a periodic review​ system, where orders are placed every 21 days. The firm strives to provide a 94.41% cycle service level. Demand averages
415 units per​ day, and the standard deviation of demand per day is 107 units. Lead time is 10 days​ (round Z-values, standard deviations to two decimal​ places).
 
a. How many units of safety stock should be​ held?
 
units​ (round your response to the nearest​ integer).
 
b. What should the target inventory level​ (order-up-to level)​ be?
 
units​ (round your response to the nearest​ integer).
 
c. Suppose that it is time to review the item. There are
158 units in​ inventory, and there is an outstanding backorder for
472 units. An order for 113 units is on the way. How many units should be ordered​ now?
 
units​ (round your response to the nearest​ integer).
 
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