Claudia, Leddy (2017) Perancangan Aktivitas Perawatan Pada Unit Produksi Continuous Tandem Cold Mill PT KRAKATAU STEEL TBK Menggunakan Reliability-Centered Maintenance II. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Unit Produksi CTCM merupakan unit produksi yang kritis di Pabrik CRM yang memegang peran penting yaitu mereduksi ketebalan. Kondisi Unit Produksi CTCM belum optimal karena unit produksi mengalami breakdown time yang tinggi. Dampak dari breakdown time adalah waktu produksi Unit Produksi CTCM yang hilang selama 482 jam pada tahun 2015, kekurangan bahan baku (shortage mill concern) pada unit produksi ECL 1 dan ECL 2, serta biaya perawatan pabrik yang tinggi. Implikasi dari permasalahan-permasalahan tersebut adalah Unit Produksi CTCM membutuhkan aktivitas perawatan yang efektif untuk mereduksi breakdown time dan biaya perawatan. Metode yang digunakan untuk menentukan aktivitas perawatan untuk Unit Produksi CTCM adalah Realibility Centered Maintenance II (RCM II). Pemilihan metode RCM II adalah karena dalam menentukan aktivitas perawatan, RCM II mengevaluasi masing-masing mode kegagalan berdasarkan aspek konsekuensi penting seperti hidden, safety, environment dan operational. Penanganan dari masing-masing mode kegagalan merupakan hal yang efektif karena variasi fungsi dan variabel penyebab kegagalan Unit Produksi CTCM yang beragam. Langkah-langkah yang dilakukan adalah melakukan analisis FMEA, evaluasi mode kegagalan dengan RCM II Decision Diagram, menentukan aktivitas perawatan yang tepat, menghitung interval perawatan masing-masing jenis aktivitas perawatan, analisis biaya dan analisis sensitivitas. Hasil Analisis RCM II didapatkan delapan mode kegagalan dapat ditangani oleh Schedule on Condition, sebelas mode kegagalan dapat ditangani oleh Schedule on Restoration, tiga mode kegagalan ditangani Schedule on Discard dan enam mode kegagalan ditangani oleh Failure Finding Interval. Hasil interval perbaikan usulan didapatkan penurunan biaya perbaikan sebesar 0,71%, setara dengan Rp 7.423.598, dan peningkatan keandalan sistem sebesar 41,19%.
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CTCM Production Unit is a critical production unit in the CRM Factory which plays an important role of reducing thickness. The Condition of CTCM Production Units is not yet optimal because the production unit experiences a high breakdown time. The impact of breakdown time is the production time of CTCM Production Units are production time loss 482 hours in 2015, shortage mill concerns on production units ECL 1 and ECL 2, and high factory maintenance costs. The implications of these problems are the CTCM Production Unit requires an effective maintenance activity to reduce breakdown time and maintenance costs. The method used to determine the maintenance activities for the CTCM Production Unit is the Realibility Centered Maintenance II (RCM II). This method is chosen because in determining the maintenance activity, RCM II evaluates each failure mode based on important consequence aspects such as hidden, safety, environment and operational. The handling of each failure mode is effective because of the variations in function and variables that cause the failure of the various CTCM Production Units. The steps taken are FMEA analysis, failure mode evaluation with RCM II Decision Diagram, determining appropriate maintenance activities, calculating maintenance intervals for each type of maintenance activity, cost analysis and sensitivity analysis. The results of RCM II analysis are there are eight failure modes can be handled by Schedule on Condition, eleven failure modes can be handled by Schedule on Restoration, three failure modes handled Schedule on Discard and six failure modes handled by Failure Finding Interval. The results of improvement interval suggestions obtained a reduction in repair costs of 0.71%, equivalent to Rp 7,423,598, and increased system reliability by 41.19%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | CTCM, Keandalan, Reliability Centered Maintenance II |
| Subjects: | T Technology > TS Manufactures |
| Divisions: | Faculty of Industrial Technology > Industrial Engineering |
| Depositing User: | Claudia Leddy |
| Date Deposited: | 02 Oct 2017 02:51 |
| Last Modified: | 08 Mar 2019 06:40 |
| URI: | http://repository.its.ac.id/id/eprint/45511 |
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