INTEGRATED ORDERING POLICIES OF INVENTORY AND AN EXAMPLE FOR TIRE COMPANIES

Yıl 2011, Cilt: 13 Sayı: 1, 41 - 52, 01.12.2011

Turan Erman Erkan Yavuz Selim Özdemir

Öz

In today's
competitive market conditions, the reduction of inventory costs is increasingly
important for surviving enterprises. One of the most important cost items that
can be reduced inventory costs. In this study, single vendor - multi buyer
supply chain system relationship investigated. Aim of the study, by adopting a
common approach of buyers with sellers, each buyer and the seller determines
the order in certain time intervals and thus give the seller and buyer is to
minimize the costs of the common stock. This approach provides a tremendous
advantage to the seller but the buyer costs may increase. To balance this
increase, the seller must make price discounts for buyers. In this research, a
non-linear model used for determine minimum stock and system costs. This model
applied on real data which were collected from Ankara area main tire vendor and
his sub buyers. In case of application of the model used in this study, tire
vendor can be provided to respond more quickly to the needs of sub-dealers.
Also overall system cost and can also decrease has occurred.

Anahtar Kelimeler

Single Vendor – Multi Buyer, Supply Chain Management, Common Replenishment Epochs

BÜTÜNLEŞİK TEDARİK ZİNCİRİ YAKLAŞIMI VE BİR LASTİK ANA BAYİİ UYGULAMASI

Öz

Günümüz rekabetçi piyasasında, işletmelerin hayatta
kalabilmesi ve rekabet edebilmesi için maliyetlerin düşürülmesi giderek daha
büyük bir önem kazanmaktadır. Azaltılabilecek en önemli maliyet kalemlerinden
bir tanesi de stok maliyetleridir. Bu çalışmada, bir satıcı ile birden çok
alıcı arasındaki malzeme tedarik zinciri ilişkileri incelenmiştir. Çalışmanın
amacı, alıcılar ile satıcının ortak bir yaklaşım benimseyerek, her alıcının
siparişlerini satıcının belirlediği belirli zaman aralıklarında vermesi ve
böylece satıcı ile alıcılardan oluşan sistemin ortak stok maliyetlerinin en aza
indirilmesidir. Ancak bu durumda alıcıların maliyetlerinde belli bir miktar
artış meydana gelmektedir. Bunu dengeleyebilmek için, satıcının alıcılara
iskonto yapması gerekmektedir. Bu araştırmada, doğrusal olmayan bir model ile
en küçük stok ve sistem maliyetleri elde edilmeye çalışılmıştır. Araştırmada
kullanılan model, Ankara'da bir lastik bölge bayisinden ve onun alt
bayilerinden alınan gerçek veriler üzerinde uygulanmıştır. Çalışmada kullanılan
modelin uygulanması durumunda, lastik bölge bayiliğinin, alt bayilerinin
ihtiyaçlarına daha hızlı cevap vermesi sağlanabilir. Ayrıca sistemin genel
maliyetlerinde de önemli bir azalma oluşacaktır.

Anahtar Kelimeler

Tekil Satıcı – Çoğul Alıcı, Tedarik Zinciri Yönetimi, Ortak Tedarik Yaklaşımı

Kaynakça

• BANERJEE, A., 1986a, On a Quantity Discount Pricing Model to Increase Vendor Profit. Management Science 32, 1513–1517.
• BANERJEE, A., 1986b, A Joint Economic Lot-Size Model For Purchaser And Vendor. Decision Sciences 17, 292–311.
• BANERJEE, A., BANERJEE, S., 1994, “A Coordinated Order-Up-To Inventory Control Policy For A Single Supplier And Multiple Buyers Using Electronic Data Interchange”. International Journal of Production Economics 35, 85–91.
• BANERJEE, A., BURTON, J.S., 1994. “Coordinated vs. Independent inventory replenishment policies for a vendor and multiple buyers”. International Journal of Production Economics 35, 215–222.
• BEATRIZ Abdul-Jalbar, JOSE M. Gutierrez, JOAQUIN Sicilia, 2007, “An Integrated Inventory Model For The Single-Vendor Two-Buyer Problem”, Int. J. Production Economics 108, 246–258
• BEN-DAYA, M., HARIGA, M., 2004, “Integrated Single Vendor Single Buyer Model With Stochastic Demand And Variable Lead Time”, Int. J. Production Economics vol: 92, pp:75–80
• BYLKA Stanislaw, 1999, A Dynamic Model For The Single-Vendor, Multi-Buyer Problem, Int. J. Production Economics 59, 297-304
• CHAN C.K. , KINGSMAN, Brian G., 2007, “Coordination In A Single-Vendor Multi-Buyer Supply Chain By Synchronizing Delivery And Production Cycles”, Transportation Research Part E 43, 90–111
• DADA, M., SRIKANTH, K.N., 1987. “Pricing Policies For Quantity Discounts”. Management Science 33, 1247–1252.
• GOYAL, S.K., 1976, An Integrated Inventory Model For A Single Supplier-Single Customer Problem. International Journal of Production Research 15 (1), 107–111.
• GOYAL, S.K., 1987, Comment On Generalized Quantity Discount Pricing Model To Increase Supplier’s Profits. Management Science 33, 1635–1636.
• GOYAL, S.K., 1988, A Joint Economic-Lot-Size Model For Purchaser And Vendor: A Comment. Decision Sciences 19, 236–241.
• GOYAL, S.K., 1995, A One-Vendor Multi-Buyer Integrated Inventory Model: A Comment. European Journal of Operational Research 82, 209–210.
• HILL, R.M., 1997, The Single-Vendor Single-Buyer Integrated Production-Inventory Model With A Generalised Policy. European Journal of Operational Research 97, 493–499.
• JOGLEKAR, P.N., 1988, Comments On A Quantity Discount Pricing Model To Increase Vendor Profits. Management Science 34, 1391–1398.
• LAL, R., STAELIN, R., 1984, “An Approach For Developing An Optimal Discount Pricing Policy”. Management Science 30, 1524–1539. LEE, H.L., ROSENBLATT, M.J., 1986, “A Generalized Quantity Discount Pricing Model To Increase Supplier’s Profits”. Management Science, 1177–1185.
• LU, L., 1995. A One-Vendor Multi-Buyer Integrated Inventory Model. European Journal of Operational Research 81, 312–323.
• MONAHAN, J.P., 1984, A quantity discount pricing model to increase vendor profits. Management Science 30, 720–726.
• PAN, J.C.-H., Yang, J.-S., 2002, “A Study Of An Integrated Inventory With Controllable Lead Time”, International Journal of Production Research vol:40, no:5, pp:1263-1273.
• PUJAWAN, I.N., KINGSMAN, B.G., 2002,” Joint Optimization Of Timing Synchronization In A Buyer Supplier Inventory System”, International Journal of Operations and Quantitative Management 8 (2), 93–109.
• VISWANATHAN, S., PIPLANI, R., 2001, “Coordinating Supply Chain Inventories Through Common Replenishment Epochs”. European Journal of Operational Research 129, 277–286.
• WOO, Y.Y., HSU, S.L., WU, S., 2001, “An Integrated Inventory Model For A Single Vendor And Multiple Buyers With Ordering Cost Reduction”. International Journal of Production Economics 73, pp:203–215.