Jufri, Nurfadhilah (2020) Pemodelan Plant Maintenance Berdasarkan Analisis Availability Pada PT XYZ. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kegiatan pemeliharaan menjadi perhatian khusus di PT XYZ, yang merupakan produsen semen terbesar di Kawasan Timur Indonesia (KTI). PT XYZ memiliki 5 pabrik utama yang berlokasi di Kabupaten Pangkep, Sulawesi Selatan yaitu pabrik unit 1,2,3,4, dan 5. Di tahun 2019, produksi klinker unit 5 PT XYZ hanya mencapai 2.445.515 ton atau 93, 64% dari target. Jika diurai lagi ke sub proses sistem sebelumnya yaitu Raw mill, terjadi ketidakcapaian produksi raw meal yaitu 4.041.377 ton atau 96,54% dari target yang telah ditetapkan perusahaan. Ketidakcapaian hari operasi Raw mill dipengaruhi adanya unplanned shutdown. Faktor terjadinya breakdown dapat dikendalikan dengan melakukan evaluasi availabilitas untuk meningkatkan availabilitas dan hari operasi (calendar day). Metode analisis availabilitas yang digunakan adalah dengan pendekatan simulasi sistem diskrit karena simulasi sistem diskrit dapat mengakomodasi perilaku acak dan ketergantungan antar variabel. Simulasi menggunakan software Arena 14.00. Pada kondisi eksisting availabilitas sistem 72,83% dan calendar day 239 hari. Kedua parameter ini masih kurang dari target. Untuk mengatasi permasalahan ini, dilakukan ekperimentasi dengan 3 skenario. Berdasarkan hasil simulasi, dapat ditunjukkan bahwa optimasi kegiatan preventive maintenance memberikan perubahan pada nilai TTF (Time to Failure), TTR (Time to Repair) dan mengurangi durasi kegiatan overhaul. Hal ini dapat meningkatkan availabilitas dan calendar day. Skenario ini menghasilkan peningkatan availabilitas menjadi 83,04% dan calendar day menjadi 255 hari.
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Maintenance activities are a particular concern at PT XYZ, which is the largest cement producer in Eastern Indonesia (KTI). PT XYZ has 5 main factories located in Pangkep, South Sulawesi, units 1,2,3,4, and 5 factories. In 2019, PT XYZ's unit 5 clinker production only reached 2,445,515 tons or 93, 64% of target. The details, Raw meal production was not achieved, namely 4,041,377 tons or 96.54% of the target set by the company. The raw mill's operating days were not achieved due to the unplanned shutdown. The breakdown factor can be controlled by evaluating availability to increase availability and day of operation (calendar day). The availability analysis method used is the discrete event simulation approach because the discrete event simulation can accommodate random behavior and dependence between variables. Simulation using Arena 14.00 software. In the existing condition, system availability is 72.83% and calendar day is 239 days. These two parameters are still less than the target. To overcome this problem, experimentation was carried out with 3 scenarios. Based on the simulation results, it can be shown that the optimization of preventive maintenance activities changes the value of TTF (Time to Failure), TTR (Time to Repair), and reduces the duration of overhaul activities. This can increase the availability and calendar day. This scenario results in an increase in availability to 83.04% and calendar day to 255 days.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | availabilitas, calendar day, simulasi kejadian diskrit, TTF, TTR, overhaul. |
| Subjects: | T Technology > TS Manufactures > TS173 Reliability of industrial products T Technology > TS Manufactures > TS174 Maintainability (Engineering) . Reliability (Engineering) |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Industrial Engineering > 26101-(S2) Master Thesis |
| Depositing User: | Nurfadhilah jufri |
| Date Deposited: | 24 Aug 2020 09:25 |
| Last Modified: | 20 Dec 2023 00:57 |
| URI: | http://repository.its.ac.id/id/eprint/80903 |
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