Browsing by Author "Edis, Rahime Sancar"

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Citation - WoS: 25
Citation - Scopus: 33
Simulation Analysis of Lot Streaming in Job Shops With Transportation Queue Disciplines
(Elsevier Science Bv, 2009) Edis, Rahime Sancar; Ornek, Arslan
In this paper we Study a multi-product lot streaming problem in a stochastic job shop with equal and discrete sublots. The problem involves splitting order quantities of different products into different number of equal sublots (NES) and analyzing the effects of sublot-related transportation queue disciplines (TRQD) for different performance measures. Our simulation results show that some combination of TRQD and NES alternatives are appropriate for some performance Measures. We also propose a simple heuristic to determine the NES of each product type to further improve the values of performance measures. (C) 2008 Elsevier B.V. All rights reserved.
Citation - WoS: 14
Citation - Scopus: 17
A Tabu Search-Based Heuristic for Single-Product Lot Streaming Problems in Flow Shops
(Springer London Ltd, 2009) Edis, Rahime Sancar; Örnek, Mustafa Arslan
Lot streaming is a technique that splits a production lot consisting of identical items into sublots to improve the performance of a multistage production system by overlapping the sublots on successive machines. In this study, a single-product multistage stochastic flow shop problem with consistent sublot types and discrete sublot sizes is considered, and a heuristic algorithm which is a combination of simulation and tabu search is presented with the objective of minimizing makespan. First, the performance of the proposed heuristic is evaluated against a deterministic model, then it is applied to stochastic flow shops and the results are compared with those of Arena's OptQuest. The computational results show that the proposed heuristic gives rather efficient results and facilitates the solution of the considered complex stochastic lot streaming problems.