Pengendalian Persediaan Bahan Baku Nalco Water Treatment Dengan Menggunakan Metode Lot Sizing

DOI: https://doi.org/10.21070/prozima.v2i2.2199

Author (s)


(1) * Masad Hariyadi   (Program Studi Teknik Industri, Fakultas Teknik, Universitas Muhammadiyah Sidoarjo)  
        Indonesia
(2)  Boy Isma Putra   (Program Studi Teknik Industri, Fakultas Teknik, Universitas Muhammadiyah Sidoarjo)  
        Indonesia
(*) Corresponding Author

Abstract


The limited supply of Nalco raw materials from producers has become a problem for PT ABC, this has led to the control of raw material inventory at PT ABC not including good management, because in the management of raw materials the company still records inventory with manual systems and in ordering raw materials only based on estimates. From the results of the study, the forecasting method used is the Double Exponential Smoothing Holt's, Brown, and Holt Winters Additive Algorithm methods, from the three methods that are most suitable is the Double Exponential Smoothing Brown method with the smallest Mean Square Error of 256.2. Calculation of Sizing Lot by using Economic Order Quantity method, Least Unit Cost method, and Silver Meal method, of the three methods the most optimal is the Economic Order Quantity method because it has the lowest cost of Rp. 12,651,145. The calculation of Safety Stock gets 17 Pail results. and for Reorder Points for Nalco Water Treatment raw material, which is 29 Pail.



Keywords

Double Exponential Smoothing, Holt Winters Additive Algorithm, Safety Stock, Lot Sizing, Reorder Point.



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References


Septemberiza, H., & Henmaidi. (2007). Evaluasi dan Penentuan Kebijakan Persediaan Bahan Baku Kantong Semen Tipe Pasted pada PT. Semen Padang. Jurnal Optimasi Industri, 6(2), 75-76.

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Sakkung, Carien Valerie & Sinuraya, Candra.(2011). Perbandingan Metode EOQ (Economic Order Quantity) Dan JIT (Just In Time) Terhadap Efisiensi Biaya Persediaan dan Kinerja Non-Keuangan (Studi Kasus Pada Pt Indoto Tirta Mulia). Jurnal Ilmiah Akuntansi. Vol.2 No.5


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