The cost of maintaining a naval inventory system with inaccurate records
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Author
Burch, Gerald F.
Date
2003-03Advisor
Koyak, Robert A.
Second Reader
Buttrey, Samuel E.
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Management of the Naval integrated supply system depends on data to provide reliable information on the quantities of items in stock at any given time. Because of the high volume of transactions that continually alter data in the inventory system, inventory record errors are practically unavoidable. The purpose of this thesis is to determine the effects of inventory data errors on both cost and effectiveness of operations at a Naval inventory site. The methodology adopted for research consists of a series of multiple-item, single-warehouse, Monte Carlo simulations, focused on one U.S. Navy inventory site, using estimates of inventory data accuracy obtained at that site. Results of the simulations show that inventory costs can be decreased and customer demand effectiveness increased by decreasing the magnitude of inventory record errors to less than ten percent. It is therefore recommended that the Navy expand its inventory accuracy goal to require that no item have an inventory record error magnitude greater than ten percent. Inventory costs and effectiveness in meeting demand for Naval material were not found to be substantially affected by inventory record inaccuracy if the magnitude of error is less than ten percent.
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