Supervisory control for deadlock-free resource allocation has been an active area of manufacturing systems research. Most work, however, assumes that allocated resources do not fail. Little research has addressed allocating resources that may fail. Automated manufacturing systems have many types of components that may fail unexpectedly. We develop robust controllers for single unit resource all...

Abstract: This paper addresses a new analytical approach to evaluate the throughput of a buffered two-workstation manufacturing system with unreliable parallel machines. The parallel machines are not necessarily identical. The failure, repair and processing times of each machine are assumed to be exponentially distributed. The proposed method is based on two steps. The first step consists of tr...

This paper examines a model of a flow line consisting of three unreliable machines and one buffer of limited capacity. The main assumptions of the model are the non linearity of the flow of material with the system performing merge operations and the new way of the machines reaching failure by allowing the machines to fail not only when they are operational but also when are either blocked or s...

The High-Variety, Low-Volume (HVLV) scheduling problem is one of the most arduous combinatorial optimization problems. This paper considers an interesting formulation of the HVLV scheduling problem using (max, +) algebra while periodic Preventive Maintenance (PM) is considered. Maintenance is time based since activities are periodically fixed: maintenance is required after a periodic time inter...

in order to perform preventive maintenance (pm), two approaches have evolved in the literature. the traditional approach is based on the use of statistical and reliability analysis of equipment failure. under statistical-reliability (s-r)-based pm, the objective of achieving the minimum total cost is pursued by establishing fixed pm intervals, which are statistically optimal, at which to replac...

Preventive maintenance policies are also planned so that the overall reliability. The optimal level of preventive maintenance that maxipreventive maintenance. Maintenance policies can be further improved when they.We design an optimal preventive maintenance policy for a system of N items. An optimal maintenance policy for a system of N items, from a particular class of.Taken into considerations...

This paper, considers Network Failure Manufacturing System (NFPMS) and production control policy of unreliable multi-machines, multi-products with perishable items. The production control policy is based on the Hedging Point Policy (HPP). The important point in the simulation of this system is assumed that the customers who receive perishable item are placed in priority queue of the customers w...

background: nowadays medical equipment plays an important role in the treatment and in the medical education. using outdated preventive maintenance (pm) system may cause problems in the cutting edge medical equipment, nervous system disease’s equipment (in diagnosis and treatment) which are crucial for every medical center. based on above facts we focused on nervous system treat units’ equipmen...