Bir Döküm Fabrîkasında Malzeme Îhtîya Ç Planlama Çalîşması Ve Parti Büyüklüğünün Bellrlenmesî

Bıı çalifmanm amacı, bir dokum sanayinde Malzeme ihtiyaç Planlama (MlP)

Anahtar Kelimeler:

Malzeme ihtiyaç planlama, Parti Biiyiitlüğii.

A Ma Terıal Requırements Plannıng Studyına Foundryand Defınıng Lot-Sızıng

in this slııdy, Malerial Requirements Pkmmng (MRP) is performed in afoımdry and evahıated lol sizing methods which are approprıale for the consideredsyslem. fıı Ijleralııre, researches are generally based on experimental data sels ascompariııg u'hich lot siziııg melhods are better. in this stııdy, by ıısiııg iııdııstria! dala,the performances of 5 differeııt methods are evalmled, aııd shown which ones areappıvpıialefor Ifıis system. An MRP implementatıon to afoımdıy is extrenıely difficultbecaııse bili of maleıials (BOM) is not generally inleger aııd a component quantitydepeııds on olher componenl qııaııtilıes. Firsily, in order to lise rcm ma/eriaîsefficiently, oplimal percenlage ofrcr. v materials ıısage is calcıılated by ıısing the iiııearprogramming lechııigııes. Then, MRP slııdy has performed on approsimalely 15] endilems ıısed in Masler Prodııction Schedule (MPS) of the fırm 'dııriııg 6 monlhs fordefıııing ııel regııirements cmd lot siziııg procedures resıılts ore allained

Keywords:

Maleria! Reyııiremeııts PIaımiııg, Lotsizing.,

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l ] Schroeder, R G., Andcrson, J. C , Tupy, S. E , and White, E., A study ofMRP benefits and costs, Joıırnal ofOperarion Management, Voî. 2, No. l, 1-9, 1981.
[2] Wagner, H., and Wbitin, , T. M., Dynamic version of economic lot size model, Management Selence, Vol. 5, No. l, 89-96, 1958.
[3] De Matteis, J. J., An economic lot-sizmg techniquc: I. The part period algorithm, IBM Systcm Journal, Vol .7. No. l, 30-38, 1968.
[4] Groham, T., Dynamic order quantities, Prodııction and Inventoty Management Joumal, Vol. 9, No 1. 75-81, 1968.
15] Bern', W., Lot sizing techniques for requirsments plarmmg systems: a frame work for analysis, Production and Inventory Management, Vol, 13, No. l, 1972.
[6f Sılvsr, E., Meal, H. A., Heuristic for selecting lot size quantities far the case of a detcrministic time varying deınand rate and discrete opportumtics for replenıshmcnt, Producbon and Inventon'. Vol. 14, No 2, 64-74, 1973.
f7] Mc Laren, B. J,, A study of multiple leve! lot sizing techniques for MRP systems, Unpublished Ph. D. DisscrtatıorL Purdus üniversity, 1977.
[81 Groff, G. K., A lot size rule for time-phased component demand, Production and Inventory Management, Vol. 20, No l, 47-53, 1979.
[91 Wemmerlov, U., Design factors in MRP systcms: a limited surv'ey, Production and Inventory Managemcnt, Vol. 20, No 4, 15-34, 1979.
[IOJ Freclaud, J. R., and Colley, J, L., A simple heuristic for lot sizmg in a time" phased r eorder system, ProUuction and Inventor>' Management, Vol. 23, No. l, 15-22, 1982.
[l l] Nydick, R. L., and Weiss, H. }., An evaluation of variable demand lot sizing tecniques, Production and Inventorv- Management, Vol. 30, No. 4, 41-44, 1989.
[12J Bregman, R. L., Seîecting among MRP lot-sizing methods for purchased components when thc planning horizon is lınuted, Production and Inventory Management Joumal Secorıd Quarter, 32-38, 1991.
[13] Colcman, B. J., Afurtheraııalysisofvariabledemandlot-sizmgtechnİques, Production and înventory VFanagement Joumal third Quarter, 19-23. 1992.
[t4J Heemsbergen, B. L., and Malstronı, E. M., A sımulation ofsingle-level MRP lot sizing heuristics: an analysis of performance by rule, Production Planning and Control, Voî. 5, No 4. 381-389. 1994.
[15] Oardmcr, C. S., aııd Bfackstone, J. H., Setups and effective capacity: the impact of İot sızing techniques in an MRP environment, Production Pla.tming auîd Controİ» Voİ . 6, No 1, 26-38, 1995.
[16] Pa^aoğlu, H., Bir Döküm Fabrikasmda Malzeme Ihîiyaç Planlaına Çalışması ve Parti Büylıklüğümm Belirlenmesi, Yüksek Lisans Tezi, Gazi Universitesi Fen Bilimleri Enstitüsii. Şubat 1999