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    Operation management: optimal inventories; calculate EOQ and ELS

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    You have just met with the Director of Purchasing. He has been attempting to reduce his costs by placing fewer, but larger, orders for raw materials. You suspect that his department's actions have been contributing to your organization's high DOS.

    Your assignment is to calculate the EOQ/ELS for the following two cases. Include your full calculations:

    Raw Material LRM:

    Annual demand has historically been about 15,000 units. Each unit costs about $40. For the annual report, due out in June, the corporate accounting department calculates inventory-holding costs by multiplying the value of each item by 0.40. The Director of Purchasing told you that his "cost of ordering" is about $82 per order. He is currently ordering 1,000 at a time. How large should the standard order size be for this product? How much are the Purchasing Director's policies costing your company? (Calculate the ordering and holding costs associated with his policies and compare them to the "optimal" ordering and holding costs.)

    Finished Product CLM:

    Annual demand has historically been about 5,700 units. The sales price for each unit of CLM is about $48. The production line that produces CLM can make 100 units per day, but it currently has 170 days per year devoted to manufacturing another project-assume 250 total production days per year. The setup cost for product CLM averages $500 per setup. How large should the production runs be for CLM?

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    Solution Preview

    Note that I assumed a holding cost in the second case at 40% of unit costs. Without a holding ...

    Solution Summary

    The solution explains the two cases and offers a solution.