Introduction Model formulation and the convexity Decision rule of the optimal cycle time T*

In this paper, a fuzzy based inventory model for imperfect quality items has been developed with shortages. The parameters fixed cost; holding cost and shortage cost are considered as fuzzy numbers. We considered the triangular fuzzy number to represents fuzzy parameters. The optimum order quantity is obtained in fuzzy sense with the help of signed distance method. The proposed model is illustr...

 The paper considers an integrated production, inspection, preventive maintenance, and inventory problem and determines the optimal inspection interval, inspection frequency, and production quantity yielding the maximum unit expected profit in an imperfect production process with inspection time and reworking. When the process in an out-of-control state produces a certain percentage of non-con...

This study considers deteriorating items having linear demand pattern, although this demand pattern is not new and lot of work has been done on this demand pattern. But this study is unique in itself, as in this study constant part of linear demand changes with each cycle, thus it gives better picture of demand then earlier models. The earlier models used to consider the constant factor of line...

In this study, a deteriorating inventory problemwith andwithout backorders is developed. From the literature search, this study is one of the first attempts by researchers to solve a deteriorating inventory problem with a simplified approach. The optimal solutions are compared with the classical methods for solving deteriorating inventory model. The total cost of the simplified model is almost ...

In a recent article published in European Journal of Operational Research, 162 (2005) 773–785, Moon et al. [1] develop economic order quantity models (A, A1, and B) for deteriorating/ameliorating items which have time-varying demand pattern over a finite planning horizon, taking account of inflation and time value of money. Although the formulation of the total cost function in all the models i...

This paper deals with an integrated model for the joint determination of economic production quantity and preventive maintenance (PM) level for an imperfect process having 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. It is assumed that, after each PM, ...