Continuous review inventory models under time value of money and crashable lead time consideration

This study first tries to find the optimal order quantity at all lengths of lead time with components crashed at their minimum duration. Second, a simple method to locate the optimal solution unlike traditional sensitivity analysis is developed. Finally, some numerical examples are given to illustrate all lemmas and the theorem in the solution algorithm. | Yugoslav Journal of Operations Research 21 (2011), Number 2, 293-306 DOI: CONTINUOUS REVIEW INVENTORY MODELS UNDER TIME VALUE OF MONEY AND CRASHABLE LEAD TIME CONSIDERATION Kuo-Chen HUNG Department of Logistics Management, National Defense University, Taiwan, . Received: April 2008 / Accepted: October 2011 Abstract: A stock is an asset if it can react to economic and seasonal influences in the management of the current assets. The financial manager must calculate the input of funds to the stock intelligently and the amount of money cycled through stocks, taking into account the time factors in the future. The purpose of this paper is to propose an inventory model considering issues of crash cost and current value. The sensitivity analysis of each parameter, in this research, differs from the traditional approach. We utilize a course of deduction with sound mathematics to develop several lemmas and one theorem to estimate optimal solutions. This study first tries to find the optimal order quantity at all lengths of lead time with components crashed at their minimum duration. Second, a simple method to locate the optimal solution unlike traditional sensitivity analysis is developed. Finally, some numerical examples are given to illustrate all lemmas and the theorem in the solution algorithm. Keywords: Inventory model, crashable lead time, time value of money. MSC: 90B05. 1. INTRODUCTION From the perspective of financial management, stocks often comprise a very large proportion of a balance sheet. Funds invested in stock cannot be used elsewhere because they are not liquid assets. They become liquid only when the stocks are sold. Considering capital running factors, stocks must be turned over fast, so enterprises must 294 . Hung / Continious Review Inventory Models determine appropriate inventory policies in order to reduce idleness of the stocks, and dead and scrap stocks in order to sell and produce .

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