Browsing by Author "Gunay, Noyan Sebla"

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Citation Count: 21
Determining the size and design of flow type and u-type warehouses
(Elsevier Science Bv, 2012) Cakmak, Emre; Gunay, Noyan Sebla; Aybakan, Gulsah; Tanyas, Mehmet
Nowadays, fluctuations of costs and costumer demands make it harder for firms to respond the market conditions effectively and cause customer and profit loss. In modern supply chain process, products must be delivered to customers in the shortest possible delivery time and this delivery time must be procured with a minimum number of stocks. Distribution for small amounts of products in a wide variety must be more frequently and more rapidly. This time constraint has a direct impact on the distribution and warehousing management. Although the importance of warehouses is emphasized in the literature, determining the size of warehouses is not mentioned enough. In this context, determining the size for a new flow type warehouse and a new u-type warehouse has been tried in this paper. A warehouse design which minimizing the total picker distance has been studied analytically with taking the number of doors into account. As a result of the calculations, different interior layouts have been proposed for the flow type warehouses and u-type warehouses. (C) 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the 8th International Strategic Management Conference
Citation Count: 77
Theory of Constraints: A Literature Review
(Elsevier Science Bv, 2014) Simsit, Zeynep Tugce; Gunay, Noyan Sebla; Vayvay, Ozalp
Theory of Constraints (TOC) is a management philosophy which is focused on the weakest ring(s) in the chain to improve the performance of systems. Companies, whether they are in the production or service sector should be more focused on understanding their own structure in terms of processes to survive in a global competition. In this situation, TOC becomes an important problem structuring and solving methodology which changes the way of thinking of managers. Since the TOC first put forth by Goldratt (1984) in his novel The Goal, the theory has drawn wide attention from practitioners and academic researchers. This study provides a review of the TOC evolution literature by its five era; the optimized product technology era, the goal era, the haystack syndrome era, the it's not luck era and the critical chain era. Our search at historical background and basic concepts of TOC aims to see how this philosophy evolves through time and how the main point of TOC researches changes. Crown Copyright (C) 2014 Published by Elsevier Ltd.