Effendi, Muyasaroh (2020) SIMULASI DINAMIS UNTUK MEMINIMALKAN BIAYA PERSEDIAAN BATU BARA MEMPERTIMBANGKAN LEAD TIME DAN KETIDAKPASTIAN PERMINTAAN PRODUK TERAK DAN SEMEN. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
PT. XYZ merupakan perusahaan semen terkemuka yang berlokasi di pulau
Jawa bagian Timur. Dalam proses produksinya PT. XYZ menggunakan bahan
bakar berupa batubara, agar proses produksinya yang bersifat kontinyu tetap
terjaga, maka persediaan batubara harus selalu terpenuhi sesuai dengan permintaan
produksi. Penelitian ini bertujuan untuk merencanakan sistem pengendalian
persediaan batubara yang paling sesuai dari hasil simulasi sistem dinamis. Dari
hasil simulasi didapatkan bahwa metode pengendalian persediaan yang lebih sesuai
diterapkan adalah metode continuous review system. Metode ini mampu
menurunkan total biaya persediaan sebesar 4.36% atau setara dengan Rp.54.8
M/tahun (dari Rp. 1.256 T menjadi Rp. 1.201 T), tingkat persediaan optimum dijaga
pada level 120.143 ton, dengan interval kedatangan setiap 1.22 hari (per 7.500 ton).
Hasil simulasi terhadap 3 skenario peramalan perusahan (RKAP) tahun 2020,
diperoleh mode B (Terak / OPC / PCC = 13.76% / 34.63% / 51.62%) paling
menguntungkan diterapkan. Pada kondisi produksi sesuai kapasitas terpasang,
terjadi penurunan total pendapatan perusahaan dan kenaikan biaya persediaan
seiring dengan naiknya permintaan terak, 1% kenaikan permintaan terak
menyebabkan penurunan pendapatan sebesar 0.51% atau Rp 59.2 M dan kenaikan
biaya persediaan sebesar 0.01% atau setara Rp 161.34 juta, sehingga perlu diambil
kebijakan memaksimalkan pemenuhan permintaan semen lebih dahulu
dibandingkan terak
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PT. XYZ is a leading cement company located in the eastern of Java. In
the production process PT. XYZ uses coal as a fuel. The production process, that is
continuous, must be maintained well, so the coal supply must always met with the
production demand. This study aims to plan the most appropriate coal inventory
control system from the dynamic system simulation results. From the simulation
results it was found that the more appropriate inventory control method applied was
the continuous review system method. This method can reduce the total inventory
cost by 4.36% or equivalent to Rp.54.8 M / year (from Rp. 1,256 T to Rp. 1,201 T),
the optimum inventory level is maintained at the level of 120,143 tons, with an
interval of arrival every 1.22 days (per 7,500 ton). The results of simulations of 3
company forecasting scenarios (RKAP) in 2020, obtained mode B (Clinker / OPC
/ PCC = 13.76% / 34.63% / 51.62%) is most advantageously applied. In the
condition of production according to installed capacity, there is a decrease in total
company revenue dan increase in total inventory cost along with the increase in slag
demand, a 1% increase in slag demand causes a decrease in revenue of 0.51% or
Rp 59.20 billion and increase in inventory cost of 0.01% or Rp 0.161 billion , so it
is necessary to take a policy of maximizing the fulfillment of cement demand before
clinker.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Simulasi Dinamis, Persediaan Batu bara, Biaya Persediaan, Ketidakpastian Permintaan. =========================================================== Dynamic Simulation, Coal Inventory, Inventory Cost, Uncertainty Demand. |
| Subjects: | T Technology > T Technology (General) > T57.62 Simulation |
| Divisions: | Faculty of Industrial Technology > Industrial Engineering > 26101-(S2) Master Thesis |
| Depositing User: | Effendi Muyasaroh |
| Date Deposited: | 21 Aug 2020 07:45 |
| Last Modified: | 18 Nov 2023 14:47 |
| URI: | http://repository.its.ac.id/id/eprint/80250 |
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