EVALUASI BULLWHIP EFFECT PADA SISTEM DISTRIBUSI RANTAI PASOK PRODUK BERDASARKAN METODE DISTRIBUTION REQUIREMENT PLANNING (DRP) (Studi Kasus : PT. Inti Sukses Sumatera)
Abstract
The obstacle that is often encountered in the product distribution system is the phenomenon of the bullwhip effect, namely the expansion of variability or differences in demand from the lower level to the top level of the supply chain. Weakness of information flow and coordination in the supply chain often results in information distortion. Distortion of information between retailers to distributors and distributors to manufacturers which results in a product deficiency or excess that affects the product inventory costs. Next step is an evaluation of the losses on the bullwhip effect on the supply chain. The study was conducted at PT. Inti Sukses Sumatera is focused on calculating the bullwhip effect at the retailer level to distributors for eight types of products distributed at two retailers, namely the Padang City area and outside Padang City based on the bullwhip effect calculation based on the Distribution Requirement Planning (DRP) calculation and analyzing product inventory costs. From the results of the study found a decrease in the value of the bullwhip effect with aggregation of demand for products and retailers (ω1) from the initial condition of 1.38 reduced to 0.2. The aggregation of demand for the product (ω2) from the initial condition 1.3 is reduced to 0.2. Aggregation of demand for retailers (ω3) initial conditions 1,009 reduced to 0.2. Aggregation of demand for echelon (ω3) initial conditions 1.1 is reduced to 0.2. Whereas the initial inventory cost of Rp 3,481,041,999 decreased to Rp 1,318,833,307,-.
Keywords: Supply Chain, Bullwhip Effect, Inventory.
References
Anderson, Eugene W., Claes Fornell & Donald R. Lehmann. 1994. Customer Satisfaction, Market Share, and Profitability: Findings from Sweden. Journal of Marketing vol. 58.
Bahagia, S.N. 2003. Sistem Inventori. Penerbit ITB. Bandung
Bhatnagar, A., Misra, S., & Rao, H. R. (2000). On risk, convenience, and Internet shopping behavior. Communications of the ACM,43(11), 98-105.
Chen, M., et al. (2006), “Enzimatic hydrolisis of corncob and ethanol production from cellulosic hydrolisate”. International Biodeterioration & Biodegradation, Vol. 59, hal 85-89, China.
Chopra, S. and Meindl, P., 2007, Supply Chain Management: Strategy, Planning and Control.
Fermilasari.R, 2008, Evaluasi Bullwhip Effect pada Supply Chain berdasarkan Centralized Demand Information (CDI), Tugas Akhir Jurusan Teknik Industri, Universitas Bung Hatta
Fransoo J.C. dan Wouters, M.J.F. 2000 , Measuring the bullwhip effect in the supply
Indrajid, Richardus Eko, dan Djokopratomo,Richardus,2002,Konsep Manajemen Supply Chain, Gramedia, Jakarta.
Janvier-James, A. M., 2012. A New Introdustion to Supply Chain and Supply Chain Management : Definitions and Theories Perspective, International Bussines Research Journla, 5 (1): pp. 194-207.
Lee, et al, 1997, Information Distortion in A Supply Chain: The Bullwhip Effect. Management Science, 43, 546-58.
Lee,H.L.,Padmanabhan,V dan Whang,S,1997, Information Distortion in a Supply Chain : The Bullwhip effect, Management Science, 43 (4): 546-558.
Operasion, 2nd or 3rd Edition, New Jersey: Pearson Prentice Hall
Pires, et al. (2001). Measuring Supply Chain Performance, Orlando.
Simchi-Levi, David ; Kaminsky, Philip ; Simchi-Levi, Edith,(2004), “Managing The Supply Chain: The Definitive Guide for the Business Professional”, The McGraw-Hill Companies : United State of America.
Tersine, Richard. J., (1994), “Principles of Inventory and Materials Management”, Fourth Edition, PTR Pretince- Hall, inc : United States of America.
