Pengendalian Persediaan Spare Part untuk Sistem Conveyor Pelabuhan di Sebuah Perusahaan Pupuk

Adilla, Atika Dienda (2024) Pengendalian Persediaan Spare Part untuk Sistem Conveyor Pelabuhan di Sebuah Perusahaan Pupuk. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pelabuhan merupakan salah satu infrastruktur vital perusahaan yang digunakan untuk distribusi bahan baku dan produk jadi. Kegiatan utama yang dilakukan di pelabuhan yaitu proses bongkar-muat. Conveyor sebagai salah satu equipment yang digunakan dalam proses bongkar-muat sering terjadi kerusakan pada spare part di dalamnya. Strategi maintenance spare part pada conveyor dilakukan berdasarkan dua strategi yaitu preventive maintenance dan replacement. Strategi replacement digunakan untuk spare part idler atau roll. Permasalahan yang dihadapi perusahaan pupuk yaitu terjadinya stockout pada spare part roll sehingga proses replacement tidak dapat dilakukan dan mengakibatkan ketercapaian service level menjadi rendah. Penyebab utama permasalahan stockout pada spare part yaitu belum adanya sistem kebijakan pengendalian persediaan dan permintaan spare part yang fluktuatif dan memiliki pola lumpy atau intermittent demand. Maka dari itu, dilakukan perancangan kebijakan pengendalian persediaan pada spare part roll. Pada penelitian ini, dilakukan klasifikasi ABC dan klasifikasi pola permintaan menggunakan perhitungan ADI-CV untuk mengetahui pola permintaan pada spare part roll. Kemudian, dilakukan perhitungan parameter persediaan dengan periodic review policy (R, s, S) dan can-order policy (s, c, S). Simulasi Monte Carlo digunakan untuk mengakomodasi ketidakpastian permintaan dari spare part roll. Berdasarkan simulasi yang dilakukan kedua kondisi perbaikan baik periodic review policy dan can-order policy sudah menghasilkan nilai yang lebih baik dibandingkan kondisi eksisting. Periodic review policy menghasilkan nilai rata-rata service level sebesar 96,73% dan jumlah biaya persediaan untuk seluruh spare part roll sebesar Rp187.040.087 dengan penurunan biaya sebesar 31,56% dari kondisi eksisting. Can-order policy menghasilkan nilai rata-rata service level sebesar 96,97% dan jumlah biaya persediaan untuk seluruh spare part roll sebesar Rp156.739.772 dengan penurunan biaya sebesar 42,65% dari kondisi eksisting. Dari hasil tersebut kedua kondisi perbaikan yaitu periodic review policy dan can-order policy sudah mencapai service level di atas 95%, sehingga untuk pemilihan kondisi perbaikan terbaik dilihat dari biaya persediaan yang paling rendah yaitu can-order policy.
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The port is one of the company's vital infrastructures used for the distribution of raw materials and finished products. The main activityat the port is the loading and unloading process. Conveyor as one of the equipment used in the loading and unloading process often occurs damage to the spare parts in it. The spare part maintenance strategy on the conveyor is carried out based on two strategies, namely preventive maintenance and replacement. The replacement strategy is used for idler or roll spare parts. The problem faced by fertilizer companies is the stockout of roll spare parts so that the replacement process cannot be carried out and results in low service level achievement. The main cause of stockout problems in spare parts is the absence of an inventory control policy system and spare part demand that fluctuates and has a lumpy or intermittent demand pattern. Therefore, an inventory control policy design is carried out on roll spare parts. In this study, ABC classification and classification of demand patterns using ADI-CV calculations were carried out to determine the demand pattern for roll spare parts. Inventory parameters are then calculated using the periodic review policy (R, s, S) and can-order policy (s, c, S). Monte Carlo simulation is used to accommodate the uncertainty of demand for roll spare parts. Based on the simulations performed, both periodic review policy and can-order policy have resulted in better values than the existing conditions. The periodic review policy results in an average service level value of 96.73% and total inventory costs for all roll spare parts of Rp187.040.087 with a cost reduction of 31.56% from the existing condition. The can-order policy results in an average service level value of 96.97% and total inventory costs for all roll spare parts of Rp156.739.772 with a cost reduction of 42.65% from the existing conditions. From these results, the two improvement conditions, the periodic review policy and the can-order policy, have reached a service level above 95%, so that the selection of the best improvement condition is considered from the lowest inventory cost, which is the can-order policy.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Can-Order Policy, Periodic Review Policy, Persediaan, Service Level, Simulasi Monte Carlo, Inventory, Monte Carlo Simulation
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD38.5 Business logistics--Cost effectiveness. Supply chain management. ERP H Social Sciences > HD Industries. Land use. Labor > HD55 Inventory control
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Industrial Engineering > 26201-(S1) Undergraduate Thesis
Depositing User:	Atika Dienda Adilla
Date Deposited:	22 Jul 2024 05:28
Last Modified:	22 Jul 2024 05:28
URI:	http://repository.its.ac.id/id/eprint/108618

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