Today, manufacturers must meet customer demands in a shorter time with the best quality and lowest cost to survive competitive environment. One way achieve this is reduce production costs by eliminating waste activities system. Machine adjustment processes are that do not create value, Single Minute Exchange of Dies (SMED), lean manufacturing tool, has been developed these activities. In paper ...

This paper explores the flexile flow lines where setup times are sequence- dependent. The optimization criterion is the minimization of total weighted completion time. We propose an iterated greedy algorithm (IGA) to tackle the problem. An experimental evaluation is conducted to evaluate the proposed algorithm and, then, the obtained results of IGA are compared against those of some other exist...

background: the objective of this work was developing a simple and stable time-based on-line setup for assessing the potential of mercury (hg) vapor adsorption of the commercial sorbents used in air sampling and control operation followed by cold vapor atomic absorption spectrometry (cvaas). methods: a special designed separation chamber was used where reduction of the injected hg (ii) solution...

background and purpose: this study was designed to investigate of simulation based education in achieves skills proficiency in medical radiation technologist students. methods: the students randomly were divided in two groups, a (n=25) and b (n=22) that received a routine course and simulation based education respectively. the chain of experiments was concerned to evaluate of skills proficiency...

This paper presents a new mathematical model for a bi-objective job shop scheduling problem with sequence-dependent setup times that minimizes the weighted mean completion time and the weighted mean tardiness time. For solving this multi-objective model, we develop a fuzzy multi-objective linear programming (FMOLP) model. In this problem, a proposed FMOLP method is applied with respect to the o...

Extensive research has been devoted to resource constrained project scheduling problem. However, little attention has been paid to problems where a certain time penalty must be incurred if activity preemption is allowed. In this paper, we consider the project scheduling problem of minimizing the total cost subject to resource constraints, earliness-tardiness penalties and preemption penalties, ...

Makine çizelgeleme problemlerinde tüm makineler daima kullanılabilir durumda değildirler. Planlı bakım, öğle yemeği ve dinlenme molaları gibi nedenlerle periyodik olarak kesintilere uğrayabilmektedirler. Ancak literatürde genellikle bu durum göz ardı edilmektedir. Bu çalışmada kullanılamayan zaman dilimlerinin sıra bağımlı hazırlık sürelerinin olduğu ilişkisiz paralel makine problemi ele alınmı...