PENENTUAN KUANTITAS OPTIMAL DAN REORDER POINT PADA PERSEDIAAN SUKU CADANG DENGAN DISTRIBUSI GAMMA

Valeriana Lukitosari

Abstract


Adanya pola demand dan lead time yang bervariasi mengakibatkan pentingnya pengelolaan suku cadang secara tepat.  Penentuan kuantitas dan reorder point yang tepat sangat berpengaruh terhadap besarnya biaya persediaan suku cadang.

Model biaya persediaan dikembangkan dengan mempertimbangkan ketidakpastian demand. Pada penelitian ini, demand dipengaruhi adanya kerusakan pada peralatan. Model awal biaya persediaan didekati dengan distribusi gamma. Hasil pengembangan model dengan distribusi gamma menunjukkan bahwa reorder point persediaan suku cadang dipengaruhi nilai safety stock persediaan. Nilai safety stock bergantung pada ekspektasi permintaan selama lead time, sebesar parameter dan .

Penelitian ini juga menunjukkan bahwa model persediaan berdistribusi gamma dapat digunakan untuk mencari kuantitas optimal melalui biaya ekspektasi kekurangan persediaan. 


Keywords


Kuantitas Optimal; Reorder Point; Distribusi Gamma

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References


Bacchetti, A. dan Saccani, N. “Spare parts classification and demand forecasting for stock control: Investigating the gap between research and practice”. Omega, Vol. 40, Iss. 6, hal 722-737, 2011.

Bain, L. J., dan Engelhardt, M. Introduction To Probability And Mathematical Statistics. United States of America: Duxbury Thomson Learning, 1992.

Driessen, M.A., Arts, J.J., van Houtum, G.J., Rustenburg, W.D., dan Huisman, B. “Maintenance spare parts planning and control: A framework for control and agenda for future research”. Beta Working Paper series, 2010.

Ghobbar, A.A. dan Friend, C.H. “Evaluation of forecasting methods for intermittent parts demand in the field of aviation: a predictive model”. Computers & Operations Research, Vol. 30, hal. 2097–2114, 2003.

Jin, T. dan Liao, H. “Spare parts inventory control considering stochastic growth of an installed base”. Computers & Industrial Engineering, 56, hal. 452–460, 2009.

Kaldchschmidt, M., Zotteri, G., dan Verganti, R. “Inventory management in a multi-echelon spare parts supply chain”. International Journal of Production Economics, 81, hal. 397-413, 2003.

Kennedy, W.J., Patterson, J.D., dan Fredendall, L.D. “An overview of recent literature on spare parts inventories”. International Journal of Production Economics, 76, hal. 201-215, 2002.

Strijbosch, L. W. G., Heuts, dan Van Der Scoot. “Improved spare parts inventory management: A case study”. Center Discussion Paper, Vol.135, 1998.

Zhou, Y., & Zhao, X. “A two-demand-class inventory system with lost-sales and backorders”. Operations Research Letters,Vol. 38, Issue 4, hal. 261–266, 2010.




DOI: http://dx.doi.org/10.12962/j1829605X.v9i1.2089

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Limits: Journal Mathematics and its Aplications by Pusat Publikasi Ilmiah LPPM Institut Teknologi Sepuluh Nopember is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
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