Model Development for Allocation of Raw Material in Timber Processing Industry in Indonesia

Authors: Muh. Hisjam, Nancy Oktyajati, Wakhid A. Jauhari, Wahyudi Sutopo

Abstract:

This research is intended to develop a raw material allocation model in timber processing industry in Perum Perhutani Unit I, Central Java, Indonesia. The model can be used to determine the quantity of allocation of timber between chain in the supply chain to select supplier considering factors that are log price and the distance. In determining the quantity of allocation of timber between chains in the supply chain, the model considers the optimal inventory in each chain. Whilst the optimal inventory is determined based on demand forecast, the capacity and safety stock. Problem solving allocation is conducted by developing linear programming model that aims to minimize the total cost of the purchase, transportation cost and storage costs at each chain. The results of numerical examples show that the proposed model can generate savings of the purchase cost of 20.84% and select suppliers with mileage closer.

Keywords: Allocation model, linear programming, purchase costs, storage costs, suppliers, transportation costs.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1058861

References:

[1] Ministry of Forestry, Export and Import of Forest Commodities, Year: 2007 — 2009, Ministry of Forestry, Republic of Indonesia, 2010.
[2] BPS — Statistics of Indonesia (2012), Export Table by Commodity.
[Online] Available: http://www.bps.go.id/eng/exim-frame.php (June 4, 2012).
[3] M. Hisjam, A. D. Guritno, H. Simon, and S. D. Tandjung, "A Framework for The Development of Sustainable Supply Chain Management for Business Sustainability of Export-Oriented Furniture Industry in Indonesia (A Case Study of Teak Wooden Furniture in Central Java Province)," Proc. of the 1st International Conference on Industrial Engineering and Service Science, Indonesia, September, 2011.
[4] N. Rizk, and A. Martel. Supply Chain Flow Planning Methodes: A review of The Lot Sizing literature. Kanada : Universite Laval Canada and Centor, 2001.
[5] Chopra, S., and Peter Meindl. Supply Chain Management: Strategy, Planning, and Operation, New Jersey: Prentice Hall, 2004.
[6] M. Caridi, M. Pero, and A. Sianesi, Linking product modularity and innovativeness to supply chain management in the Italian furniture industry, Int. J. Production Economics 136 (2012): pp. 207-217.
[7] D.J. Robb, B. Xiea, and T. Arthanari, Supply chain and operations practice and performance in Chinese furniture manufacturing, Int. J. Production Economics 112 (2008): pp. 683-699.
[8] M. Ouhimmou, S. D'Amours, R. Beauregard, D. Ait-Kadi, and S.S. Chauhan, Furniture supply chain tactical planning optimization using a time decomposition approach, European Journal of Operational Research 189 (2008): pp.952-970.
[9] S.L. Narasimhan, D.W. McLeavey, and P.J. Bilington, Production Planning and Inventory Control. New Jersey : Prentice Hall, 1995.