Analysis of Spare Part Inventory Policy to Machines Availability and Throughput using Discrete Event Simulation Approach (Case Study: PT Steel Pipe Industry of Indonesia)

Baihaqy, Ahmed Raecky (2019) Analysis of Spare Part Inventory Policy to Machines Availability and Throughput using Discrete Event Simulation Approach (Case Study: PT Steel Pipe Industry of Indonesia). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT Steel Pipe Industry of Indonesia Tbk adalah penghasil pipa baja terbesar di Indonesia. Produksi disokong oleh 6 unit yang tersebar di Indonesia. Salah satunya adalah Unit 1 yang terletak di SIER, Surabaya. PT Spindo Unit 1 memiliki kapasitas 6,250 MTPY dan unit ini memiliki 5 lini produksi. Saat ini, PT Spindo Unit 1 memiliki permasalahan dalam hal availabilitas lini produksi yang menyebabkan throughput tidak maksimum. Hal ini menyebabkan service level terhadap customer menurun. Ternyata salah satu faktor penyebab menurunya availabilitas adalah ketersediaan suku cadang. Beberapa suku cadang tidak tersedia saat dibutuhkan untuk perbaikan mesin yang rusak sehingga downtime pun meningkat, sehingga availabilitas mesin menurun sebagai konsekuensi. Maka, pada penelitian ini penulis mencoba untuk mengamati efek dari perubahan kebijakan persediaan suku cadang terhadap availabilitas mesin dan pemenuhan permintaan sebagai performansi kunci dari sistem. Saat ini, persediaan suku cadang menggunakan sistem s,S. Metode yang digunakan dalam penelitian ini adalah simulasi kejadian diskrit karena metode ini mampu mengatasi kompleksitas akibat variabilitas dan ketergantungan di dalam sistem. Berdasarkan kondisi yang ada menurut simulasi, diperoleh hasil bahwa availabilitas sebesar 0.9268 dan 90.06% permintaan terpenuhi. Menggunakan eksperimentasi, diperoleh skenario yang signifikan dan efisien dari segi biaya yakni menggunakan kebijakan s,Q dimana baik availabilitas dan pemenuhan permintaan naik menjadi 0.9370 dan 91.61% berturut-turut. =============================================================================================== PT Steel Pipe Industry of Indonesia Tbk is the biggest steel pipe manufacturer in Indonesia. The production is supported by 6 units spread all over Indonesia. One of the units is Factory Unit 1 situated in SIER, Surabaya. PT Spindo Factory Unit 1 has capacity of 6,250 MTPY and this unit has 5 production lines. Currently, PT Spindo Unit 1 has problem in term of availability of its production line causing the throughput is not maximum. This will make the service level toward customer is declining. Turns out that one of the factors causing the declining availability is the availability of spare parts. Some of spare parts are unavailable when it is needed for repairing the failed machine causing the downtime is increasing, thus the availability will be decreasing as the consequences. Therefore, in this research writer tries to observe the effect of changing the spare part inventory policy to the availability and demand fulfillment as the key performance of this system. Currently, spare parts inventory in PT Spindo is s,S. The method used in this research is discrete event simulation because this method is able to overcome complexity due to variability as well as dependability within system. Based on the existing condition result based on simulation, it is obtained that the current availability is 0.9268 and 90.06% demand fulfilled. Using experimentation, obtained that the significant yet cost-efficient scenario is using s,Q policy where the both availability and percentage demand fulfillment are increasing whose values are 0.9370 and 91.61% respectively.

Item Type: Thesis (Undergraduate)
Additional Information: RSI 658.787 Bai s-1 2019
Uncontrolled Keywords: Availability, Demand Fulfillment, Spare Parts, Inventory Policy, Discrete Event Simulation
Subjects: T Technology > T Technology (General) > T57.62 Simulation
T Technology > TS Manufactures > TS174 Maintainability (Engineering) . Reliability (Engineering)
Divisions: Faculty of Industrial Technology > Industrial Engineering > 26201-(S1) Undergraduate Thesis
Depositing User: Ahmed Raecky Baihaqy
Date Deposited: 31 May 2021 09:45
Last Modified: 31 May 2021 09:45
URI: https://repository.its.ac.id/id/eprint/60243

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