inventory control problem is one of the problems in decision making and management that contains non-crisp parameters in real world. economic production quantity (epq) model in fuzzy environment has been studied so far by many researchers. one of the main assumptions in all previous researches was neglecting the inventory shortage. in this research, a new multi-item epq model with fuzzy random ...

This paper studies operations sequencing for a multi-stage production inventory system with lead times under predictable (deterministic) yield losses in the presence of uncertain demand, with full or partial release of work-in-process (WIP) inventories, for preor post-operation cost structures, and under the total discounted or average cost criteria. We derive necessary and sufficient criteria ...

This article presents theoretical basis of spare parts inventory management in manufacturing company. Basis definitions, allocation and differences in spare parts inventory management were compared with other manufacturing inventories. The issue of spare parts inventory management is emphasized in aspect of maintaining continuity of production and generated costs of maintaining inventory.

We review the field of Materials Requirements Planning (MRP) and Production and Inventory Control (PIC) theory and highlight their similarities, differences and some conditions for oneto-one correspondence. The most important similarity is the use of transform techniques to model time delays in the systems. However MRP theory treats complete product structures, whereas PIC has usually been only...

Models of double-source queuing-inventory systems are studied in the presence a finite buffer for waiting queue consumer customers, where instant destruction inventory is possible. It assumed that lead times orders, as well cost delivery from various sources, differ each other. Replenishment stocks sources carried out according to following scheme: if level drops reorder point s, then regular o...

This study considers a multi-stage multi-item production plant with its supply chain and customer environment. The production, supply and inventory plan is optimized on a dual-mode basis, under two different information patterns. The short-term plan relies on firm orders received from customers. On the contrary, the long-term plan is based on predicted demands represented by random sequences. I...

Sunday Monday 8:30 on Registration open from 8:30 Coffee and muffins 8:30 on Registration open from 8:30 Coffee and muffins 9:15-9:30 Opening Session 9:15-9:30 Prize Award Ceremony 9:30-10:10 Naor Lecture: Martin Grötschel 9:30-10:10 Plenary Lecture: Yoav Benjamini 10:15-11:30 Parallel Session S1 ש 1 :Military OR 1: in memory of Uriel Rothblum ש 2 : Supply Chain Management 1 ש 3 :Transportation...

This paper implements the inventory model developed in the first part of this paper in a simplified problem to simultaneously reduce costs and risks in JIT systems. This model is developed to ascertain an optimal ordering strategy for procuring raw materials by using regular multi-external and local backup suppliers to reduce the total cost of the products, and at the same time to reduce the ri...

We look at routing and scheduling problems on Kelly type networks where the injection process is under the control of an adversary. The novelty of the model we consider is that the adversary injects requests of distinct types. Resources are subject to switch-over delays or setups when they begin servicing a new request class. In this new setting, we study the behavior of sensible policies as in...