Conventional approaches for deriving optimal production lot size are by using the differential calculus on the production-inventory cost function with the need to prove optimality first. Recent articles proposed the algebraic approach to the solution of classic economic order quantity and economic production quantity (EPQ) model without reference to the use of derivatives. This note extends it to an EPQ model taking the random defective rate and imperfect rework process into consideration. We demonstrate that the optimal lot size can be solved algebraically and the expected inventory cost can be derived immediately as well.
Note on “Effects of Random Defective Rate and Imperfect Rework Process on Economic Production Quantity Model”
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Chiu, Y. P., and Chiu, S. W. (March 5, 2005). "Note on “Effects of Random Defective Rate and Imperfect Rework Process on Economic Production Quantity Model”." ASME. J. Manuf. Sci. Eng. February 2006; 128(1): 375–377. https://doi.org/10.1115/1.2039948
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