Over the past two decades, a large number of metallic foams have been developed. In recent years research on this multi-functional material class has further intensified. However, despite their unique properties only a limited number of large-scale applications have emerged. One important reason for this sluggish uptake is their high cost. Many cellular metals require expensive raw materials, c...

In order to determine the efficiency of a production system, batch size and throughput are two important parameters that must be considered. In order to ensure system efficiencies and meet optimum utilization, batch size must conform to the throughput. The use of Queuing Network Theory to study the effect of batch size and throughput in optimizing the resource utilization, particularly machine ...

This paper describes a simulation-based intelligent decision support system (IDSS) for real time control of a flexible manufacturing system (FMS) with machine and tool flexibility. The manufacturing processes involved in FMS are complicated since each operation may be done by several machining centers. The system design approach is built around the theory of dynamic supervisory control based on...

The theory of constraints is an approach to production planning and control that emphasizes on the constraints to increase throughput by effectively managing constraint resources. One application in theory of constraints is product mix decision. Product mix influences the performance measures in multi-product manufacturing system. This paper presents an alternative approach by using of goal pro...

BACKGROUND The use of centrifugation-based approaches for processing donated blood into components is routine in the industrialized world, as disparate storage conditions require the rapid separation of 'whole blood' into distinct red blood cell (RBC), platelet, and plasma products. However, the logistical complications and potential cellular damage associated with centrifugation/apheresis manu...

Untangling Trade and Technology: Evidence from Local Labor Markets We juxtapose the effects of trade and technology on employment in U.S. local labor markets between 1990 and 2007. Labor markets whose initial industry composition exposes them to rising Chinese import competition experience significant falls in employment, particularly in manufacturing and among non-college workers. Labor market...

we compare two approaches for a markovian model in flexible manufacturing systems (fmss) using monte carlo simulation. the model which is a development of fazlollahtabar and saidi-mehrabad (2013), considers two features of automated flexible manufacturing systems equipped with automated guided vehicle (agv) namely, the reliability of machines and the reliability of agvs in a multiple agv jobsho...

This study examines a multi-item manufacturing problem with single machine, an outsourcer, and random defective items. To cope the increasing multi-product demands from global markets, modern firms must make efficient production plan to satisfy customer’s needs quality goods smooth in-house fabrication schedule utilization. Outsourcing is effective option avoid machine overloads schedules. Furt...

Machine loading problem in a flexible manufacturing system (FMS) encompasses various types of flexibility aspects pertaining to part selection and operation assignments. The evolution of flexible manufacturing systems offers great potential for increasing flexibility by ensuring both cost-effectiveness and customized manufacturing at the same time. This paper proposes a linear mathematical prog...

-Wafer fabrication is one of the most competitive manufacturing business in the world. In order to survive from such strongly competitive environment, finding an effective schedule which can result in higher machine utilization and throughput rate, shorter cycle time, and lower WIP (Work-In-Product) inventory becomes a major task. Besides that, in order to help customers to make ordering decisi...