Maharani, Sarah Putri (2021) Optimasi Waktu Penggantian Komponen Bucket Hydraulic Cylinder Pada Excavator Pertambangan PT “XYZ” Menggunakan Model Power Law Process. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Bucket hydraulic cylinder merupakan suatu komponen excavator yang repairable sehingga kerusakan pada komponen ini dapat diatasi dengan perbaikan dan penggantian secara berkala. Permasalahannya, penetapan waktu penggantian bucket hydraulic cylinder tidak dapat dilakukan secara asal karena dapat menyebabkan pembengkakan biaya akibat kerusakan. Oleh karena itu, pada penelitian ini dilakukan optimasi waktu penggantian bucket hydraulic cylinder agar dapat meminimumkan biaya akibat kerusakan komponen. Power Law Proces, yaitu suatu model Non-Homogeneous Poisson Process, digunakan untuk memodelkan laju kerusakan komponen. Hasil analisis menunjukkan bahwa waktu penggantian optimal bucket hydraulic cylinder adalah pada saat komponen mencapai usia 3.367 hours meter atau pada saat komponen mengalami kerusakan ke-6, tergantung mana yang lebih dulu terjadi. Pada waktu penggantian tersebut diperkirakan biaya akibat kerusakan komponen adalah sebesar Rp. 24.229 per hours meter atau setara Rp. 78.429.273 per rata-rata usia penggantian, yaitu 3.237 hours meter. Jika dibandingkan dengan kebijakan saat ini, maka waktu penggantian hasil optimasi ini akan menurunkan biaya akibat kerusakan sebesar 6,81% untuk tiap komponen.
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Bucket hydraulic cylinder, which is a component of excavator heavy equipment, is a repairable component so that damage in the bucket hydraulic cylinder components can be overcome by periodic repair and replacement. The problem is the determination of the replacement time for the bucket hydraulic cylinder components cannot be carried out randomly because it can cause the cost overruns due to failure. Therefore, in this study, the optimization of replacement time for bucket hydraulic cylinder components is carried out to minimize the cost of component failures. The Power Law Process model, which is a model that follows the Non-Homogeneous Poisson Process, is utilized to model the breakdown of hydraulic cylinder bucket components. The results of the analysis show that the optimal replacement time for the bucket hydraulic cylinder component is when the component reaches the age of 3.367 hours meter or when the component experiences the 6-th failure, depending on which occurs first. The expected cost of failures is Rp. 24.229 per hours meter or equivalent to Rp. 78.429.273 per mean time to replacement, which is 3.237 hours meter. The replacement time of this optmization result will reduce the cost of failures by 6,81%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Bucket Hydraulic Cylinder, Non-Homogeneous Poisson Process, Optimasi, Power Law Process, Waktu Penggantian, Bucket Hydraulic Cylinder, Non-Homogeneous Poisson Process, Optimization, Power Law Process, Replacement Time |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA169 Reliability (Engineering) |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Statistics > 49201-(S1) Undergraduate Thesis |
| Depositing User: | Sarah Putri Maharani |
| Date Deposited: | 28 Aug 2021 05:38 |
| Last Modified: | 28 Aug 2021 05:38 |
| URI: | http://repository.its.ac.id/id/eprint/90221 |
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