Inventory control for returnable transport items in a closed-loop supply chain |
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Institution: | 1. Department of Industrial Engineering, Tsinghua University, Beijing 100084, China;2. Department of Civil and Environmental Engineering, Portland State University, PO Box 751 - CEE, Portland, OR 97207, USA |
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Abstract: | An inventory control model for returnable transport items (RTI) where the manager selects the optimal length for inspection, repair, and purchase cycles is described. Repaired and newly obtained RTI are used in combination to satisfy current production requirements. Uncertain returns are incorporated into the model by determining a satisfactory safety stock level to buffer the inventory of used and repairable containers. The minimum cost solution is obtained when inspection and repair runs begin simultaneously. Cycle times are a function of the expected return rate and repairable percentage, while variability in these random assumptions affects the required safety stock. |
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Keywords: | Closed-loop supply chain Inventory control Return rate Returnable transport items Safety stock Stochastic returns |
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