Comment on 'Optimal inventory replenishment policy for the EPQ model under trade credit derived without derivatives' Jinn-Tsair Teng a; S. K. Goyal b a Department of Marketing and Management Sciences, The William Paterson University of New Jersey, Wayne, New Jersey 07470-2103, USA b Department of Decision Sciences & MIS, John Molson School of Business, Concordia University, Montreal, Quebec, Ca...

In this paper, we study an economic production quantity (EPQ) problem in which an item is produced by a single machine. We assume that the machine may fail in an exponential random time. The repair time is an exponential random variable. It is possible to satisfy the demand from an outside supplier when the machine is failed. The objective is to determine the production and order quantities in ...

In this paper, an extended economic production quantity (EPQ) model is investigated, where demand follows a random process. This study is motivated by an industrial case for precision machine assembly in the machinery industry. Both a positive resetup point s and a fixed lot size Q are implemented in this production control policy. To cope with random demand, a resetup point, i.e., the lowest i...

This paper deals with an integrated model for the joint determination of both economic production quantity (EPQ) and level of preventive maintenance (PM) for an imperfect production process. This process has a general deterioration distribution with increasing hazard rate. The effect of PM activities on the deterioration pattern of the process is modeled using the imperfect maintenance concept....

A deteriorating inventory model using time-value of money with price dependent declined quadratic demand allowing promotion policy is developed for a deterministic inventory system. This study applied the discounted cash flows (DCF) approach for problem analysis with shortages in economic production quantity (EPQ) model. The objective of this model is to maximize the net present value profit so...

In this paper, we develop an economic production quantity (EPQ) model under machine breakdown and two types of repair (corrective and preventive). also, study the simultaneous effect of holding safety stock and purchasing policy. In order to avoid shortages occurring as a result of the random repair time, in addition to keep safety stock, we suppose that the manufacturer could purchase some qua...

Background: Many businesses want to include sustainability in their manufacturing operations. A conventional economic production quantity (EPQ) model is employed calculate the ideal number of products manufacture at one time. The goal this study was look current research on sustainable and supply chain models suggest prospective future directions based existing knowledge gaps. Methods: In persp...

In this paper, we extend Porteus (1986) to generalize the economic production quantity (EPQ) model with finite production rate and to derive an exact expression for the expected total annual cost function when maintenance actions and capital investment in setup cost reduction are adopted. In addition, the uniqueness property of the optimal lot size and the bounds of optimal lot size are derived...

Deterministic Economic Order Quantity EOQ models have been studied intensively in the literature, where the demand process is described by an ordinary differential equation, and the objective is to obtain an EOQ, which minimizes the total cost per unit time. The total cost per unit time consists of a “discrete” part, the setup cost, which is incurred at the time of ordering, and a “continuous” ...