نتایج جستجو برای: setup cost reduction for defective and non defective items
تعداد نتایج: 19242487 فیلتر نتایج به سال:
In manufacturing systems, defective items are produced for machine drift and error. Usually, an imperfect production rate is random, if the not reworked, these considered trash harm environment. The proposed model aims to reduce waste by reworking products maximizing profit. For profit maximization or overall cost minimization of system, setup has significant. A discrete investment each phase i...
Efficiency in the supply chain can be established by integrating supplier-retailer inventory policy. This article proposes integrated model between under stochastic demand. aims to determine optimal review period and calculate total cost, including some defective items, backorder price discounts, losing flexibility costs. We assume that retailer order 'n' times for every 'm' shipment from suppl...
We study a problem of lot-sizing and sequencing several discrete products on a single machine. A sequence dependent setup time is required between the lots of different products. The machine is imperfect in the sense that it can produce defective items, and furthermore, it can break down. The number of the defective items of each product is given as an integer valued non-decreasing function of ...
burnout is a response to the chronic work stress which is prevalent mostly among the people who do people job, like teaching. the purpose of this study was to develop a valid and reliable instrument that can measure burnout in foreign language teachers. although some widely used instruments were developed before which measured burnout in teachers, a specific instrument which include specific sy...
Mathematical models have been used in many areas of supply chain management. In this paper, we present a mixed-integer non-linear programing (MINLP) model to solve a multi-period, closed-loop supply chains (CLSCs) with two echelons consist of producers and customers. In order to satisfy the demands, the producers are be able to order for materials in the beginning of each period for one or more...
A production-inventory model is proposed for a manufacturing process used to produce a single product in batches to meet a deterministic demand. The process is assumed to be in-control at the start of a production run. Then, the process may shift to an out-of-control state at a random point in time, and a fixed portion of items produced is defective. These defective items cannot be repaired or ...
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
We study the impact of the efforts aimed at reducing the lead-time variability in a quality-adjusted stochastic inventory model. We assume that each lot contains a random number of defective units. More specifically, a logarithmic investment function is used that allows investment to be made to reduce lead-time variability. Explicit results for the optimal values of decision variables as well a...
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