Using the data regarding the inventory management of a stock-keeping unit shown in the following table, it can be concluded that the economic time interval for establishing an optimal policy for a fixed-period system (FPS) under the model assumptions is: Demand Order Cost Inventory-Holding Cost Lead Time Standard Deviation in Weekly Demand 7 Service Level 12,000 units per year $50 per order $0.5 per unit per year 2 weeks 95 percent (z = 1.645) more than 3 weeks but less than or equal to 6 weeks. O more than 9 weeks. more than 6 weeks but less than or equal to 9 weeks. less than or equal to 3 weeks.

Using the data regarding the inventory management of a stock-keeping unit shown in the following table, it can be concluded that the economic time interval for establishing an optimal policy for a fixed-period system (FPS) under the model assumptions is: Standard Deviation in Weekly Demand / Service Level 95 percent (z=1.645) more than 3 weeks but less than or equal to 6 weeks. more than 6 weeks but less than or equal to 9 weeks. less than or equal to 3 weeks. more than 9 weeks