Decreasing Total Inventory Cost by Controlling Inventory in Motorcycle Dealer
Keywords:ABC Analysis, Economic Order Quantity, Exponential Smoothing, Regression Linear, Safety Stock , Spare Parts Inventory.
This research was conducted at one of the motorcycle dealers in Indonesia. Besides selling motorcycles, this dealer also provides services to repair motorcycles and sells genuine motorcycle parts. Inventory management which the company carried out is still not good enough because there are still demand for spare parts from consumers that cannot be fulfilled by the company. The purpose of this study is to draw up a plan to control spare parts by paying attention to the spare parts that need to be considered, estimating the exact number of spare parts demand, knowing the smallest total inventory cost, knowing the amount of safety stock needed, and knowing when to reorder. In preparing the spare parts control, the methods used are ABC analysis, demand forecasting method, and EOQ method. The results of this study are plans to control the inventory of Tire, Rr. such as the forecasting sales of Tire, Rr. as many as 17338, economic order quantity of Tire Rr are 2158 units, the number of safety stocks of Tire, Rr. needed in 2020 are 1738 units, and the reorder point in 2020 is 8 times with the total inventory cost for Tire, Rr. in 2020 is Rp. 30,009,005.
R. Handanhal V. and Ram B. Misra. “ABC analysis for inventory management : Bridging the gap between research and classroom American,” Journal of Business Education, vol 9 (1), pp.39–48,2016.
Kumar, Nand, and Rohan Soni. “ABC analysis in the hospitality sector : A case study,”International Jounal of Advanced Production and Industrial Engineering Operations & SCM, (Sp Issue), pp.1–3, 2017.
A. Qurrotul and Dyah Riandadari. “Analisis Perencanaan Persediaan Spare Part Mobil dengan Metode ABC (Konsep 80-20) pada Gudang Suku Cadang di Bengkel PT. Like Satu Invicta Toyota Pamekasan” Jurnal Pendidikan Teknik Mesin (JPTM),vol 7 (1): pp.102–108, 2018.
L. Jiapeng, Xiuwu Liao, Wenhong Zhao, and Na Yang. “A classification approach based on the outranking model for multiple criteria ABC analysis,” The International Journal of Management Science Omega,vol. 61, pp.19–34, 2016.
A. Noor, and Ahmad Muhsin. “Analisis pengendalian persediaan bahan baku dengan metode economic order quantity dan kanban pada pt adyawinsa stamping industries,” , Jurnal OPSI 10vol.2, pp.128–142, 2017.
N. Ndivhuwo, and Charles Mbohwa. “Relationship between inventory management and uncertain demand for fast moving consumer goods organizations,”Procedia Manufacturing, vol. 8, pp. 699–706, 2017.
Andira, Olivia Elsa. “Analisis persediaan bahan baku tepung terigu menggunakan metode eoq (economic order quantity) pada roti puncak Makassar,”Jurnal Ekonomi Bisnis 21, vol. 3, pp.201–208, 2016.
Khamaludin, Vitara Agustianna, Aji Darmawan, dan M. Laedy Dermawan. “Peramalan penjualan hijab sxproject menggunakan metode moving average dan exponential smoothing,” Jurnal Keilmuan dan Aplikasi Teknik (UNISTEK) 6, vol. 2, pp.13–16, 2019.
Iksan, Nur, Yogie Pratama Putra, dan Erika Devi Udayanti. “Regresi linear untuk prediksi permintaan sparepart sepeda motor,”Information Technology Engineering Journals (ITEJ) 3, vol. 2, pp. 2548–2157, 2018.
Jonsson, Patrik, and Stig-Arne Mattsson. “An inherent differentiation and system level assessment approach to inventory management,” The International Journal of Logistics Management 30, vol. 2, pp.663–680, 2019.
Lindsey, Matthew, and Robert Pavur. “A comparative evaluation of intermittent demand forecasting with updated smoothing constants,” Advances in Business and Management Forecasting, vol. 11, pp. 39–47, 2016.
Azzi, Anna, Daria Battini, Maurizio Faccio, Alessandro Persona, and Fabio Sgarbossa. “Inventory holding costs measurement : a multi-case study,”The International Journal of Logistics Management 25, vol.1, pp. 109–132, 2012.
M. Victoire. ” Inventory Management Techniques and its contribution on better management of manufacturing companies in Rwanda,” European Journal of Academic Essays 2, vol. 6, pp.49–58, 2015.
Syntetos A.A., and M. Keyes. “Demand categorization in a European spare parts logistics network,”International Journal of Operations & Production Management 29, vol. 3, pp. 292–313, 2009.
Hyndman and Athanasopoulos, Forecasting Principle and Practice, Edition 2. Australia, 2018. [Online] Available: Otexts.
Rumawan, Fatkhul Hani, Muslimin, dan Ibon Ba’ba, Prosiding Seminar Nasional Teknologi V: Peramalan kebutuhan daya listrik jangka menengah (2019-2022) Universitas Mulawarman Kota Samarinda dengan metode regresi linear, Samarinda, Indonesia pp.202-210, Oktober 10 2019.
B. Donald J, Manajemen Logistik, Edition 1, Bumi Aksara, Jakarta, 2018.
H. Jay and Barry Render, Operation Management, Book 1 edition 9, Salemba empat, Jakarta,2011.
A. Sofjan, Manajemen Pemasaran, Rajawali Press, Jakarta,2004.
A. Sofjan, Manajemen Operasi Produksi (Pencapaian Sasaran Organisasi Berkesinambungan), Edition 3, PT Raja Grafindo Persada, Jakarta, 2016.
H. Rika Ampuh, Manajemen Pabrik, Bumi Aksara, Jakarta, 2009.
A. Sofjan, Manajemen Produksi dan Operasi, Edisi Revisi, Lembaga Penerbit Fakultas Ekonomi Universitas Indonesia, Jakarta, 2008.
H. Jay and Barry Render, Manajemen Operasi, vol 2, ed. 9. Salemba Empat, Jakarta, 2010.
B. Ronald H, Business Logistic Supply Chain Managemen, Fifth Edition Prentice Hall. Inc, New Jersey, 2004.
H. Johan, Analisis Regresi Linear, first printing, Gunadarma, Depok, 2018.
P. Hery & Fitri Lukiastuti, Manajemen Operasi, first printing, PT. Buku Kita, Jakarta, 2009.
Vollmann, T. E., Manufacturing planning and control systems for supply chain management, McGraw-Hill Education, 2004.
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