کاهش هزینه‏‌های مرتبط با موجودی از مهم‌ترین استراتژی‌‏های هر بنگاه اقتصادی برای بقا و سوددهی در شرایط رقابتی امروزی است. این راستا مدل‏‌های کلاسیک هزینه‏‌ها مطرح شده‌اند؛ اما کنار مزایای فراوان دارای فرضیه‌های محدودکننده‌ای هستند. پژوهش، یک زنجیره سه­‌سطحی لجستیکی شامل تولیدکننده، توزیع‌‏کننده خرده‏‌فروش نظر گرفته می‏‌شود مسئله بهینه‌سازی مدل توزیع‌کننده موردبررسی قرار می‏‌گیرد. موردنظر، توزیع‏...

This article develops a dynamic game model of a supply chain consisting of one manufacturer and one retailer to study the coordination mechanism and the effect of demand disruption on the coordination mechanism, where the market demand is sensitive to retail price and service. We assume that the supplier and the retailer only know the distribution of the disrupted amount after the demand disrup...

In this paper, a newsboy model is developed under uniformly distributed lead-time and demand that is an appropriate assumption in obtaining optimal relief inventory of humanitarian disasters. It is noteworthy that limited historical data are in hand on relief operations. Hence, analytical and approximate solutions for optimal relief order quan­tity were derived. The effect of lead-time uncertai...

assess the ecological effects of economic activity on the water, earth and man in the iranian economy approach using input - output tablewater is a vital resource for each biological and economic phenomenon. water is considered as a production input. production is not possible without water in all economic sectors. also, the environment including air, soil, fauna and plants utilize water in the...

in the fundamental production inventory model, in order to solve the economic production quantity (epq) we always fix both the demand quantity and the production quantity per day. but, in the real situation, both of them probably will have little disturbances every day. therefore, we should fuzzify both of them to solve the economic production quantity (q*) per cycle. using α-cut for defuzzific...

In this study, the effect of a temporary price discount for a larger order than the regular order offered by the supplier on the retailer’s ordering policy is studied. The demand is assumed to be stock-dependent. The units in inventory deteriorate at a constant rate. This study will help the retailer to take the decision whether to adopt a regular or special order policy. The optimum special qu...

To attract and keep customers, companies, especially those in e-business, are increasingly offering free shipping to buyers whose order sizes exceed the free shipping quantity. In this paper, given the supplier offers free shipping and the retailer faces stochastic demand, we determine the retailer’s (i.e., the newsvendor’s) optimal order quantity and the optimal selling price simultaneously. W...

With the increase in varieties products and increasing uncertainty about product demand, production preparation time is a significant factor addressing these issues. The trade-off between reduction of associated cost remains critical decision. this backdrop, study presents continuous review production-inventory model with variable time-dependent setup cost. demand during captured through min-ma...

As an effective way of decreasing production cost, remanufacturing has attracted more and more attention from firms. However, it also brings many difficulties to firms, especial when firms remanufacture products which they produce. A primary problem for the case is how to acquire the used product sold by the firm itself. In this paper, we consider a return compensation policy for acquiring used...