FITRIANI, LAILA (2023) PENGENDALIAN PERSEDIAAN BAHAN BAKU DENGAN MODEL Q BACK ORDER PADA PRODUKSI POLYETHYLENE PT LOTTE CHEMICAL TITAN NUSANTARA. S1 thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.
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Abstract
The availability of raw materials is a must in order to ensure smooth production process. PT Lotte Chemical Titan Nusantara experienced problems with availability of raw materials. Calculation of raw materials resulted in value that was not optimal, inventories of ethylene 9,174 MT and butene-1 7,891 MT resulting shortage of raw material inventories. The approach used in research is quantitative approach which produces optimal control of raw materials using proposed model the back order Q model. The inventory control model developed through the back order Q model has four decision variables and one objective function. Model decision variables total inventory (q0), reorder point (r), safety stock (Ss) and service level (Tp). The objective function model is inventory cost. The results of development the back order Q model inventory control provide an optimal solution for company because is able to optimize the cost of ethylene IDR 3,207,748,552,882 and butene-1 IDR 3,753,832,528,638. With a total inventory 15,665 MT of ethylene and 12,991 MT and butene-1. For the service level of ethylene 99.336% and butene-1 99.486%. The reorder point (r) of ethylene is 12,253 MT and butene-1 is 9,448 MT. The safety stock (Ss) for ethylene 6,170 MT and butene-1 4,896 MT.
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Ketersediaan bahan baku yang tepat menjadi suatu keharusan demi menjamin kelancaran proses produksi. PT Lotte Chemical Titan Nusantara mengalami permasalahan ketersediaan bahan baku. Perhitungan bahan baku menghasilkan nilai yang belum optimal, persediaan ethylene 9.174 MT dan butene-1 7.891 MT sehingga mengakibatkan kekurangan persediaan bahan baku. Pendekatan yang dilakukan dalam penelitian adalah pendekatan kuantitatif yang menghasilkan pengendalian bahan baku optimal menggunakan model usulan Model Q back order. Model pengendalian persediaan yang dikembangkan melalui model Q back order memiliki empat variabel keputusan dan satu fungsi tujuan. Variabel keputusan model diantaranya total persediaan (q0), titik pemesanan ulang (r), persediaan pengaman (Ss) dan tingkat pelayanan (Tp). Fungsi tujuan model adalah total biaya persediaan. Hasil pengembangan model pengendalian persediaan model Q back order memberikan solusi yang optimal bagi perusahaan karena mampu mengoptimalkan biaya total persediaan bahan baku ethylene Rp 3.207.748.552.882 dan butene-1 Rp 3.753.832.528.638. Dengan jumlah persediaan bahan baku ethylene 15.665 MT dan bahan baku butene-1 12.991 MT. Untuk tingkat pelayanan bahan baku ethylene 99,336% dan untuk bahan baku butene-1 99,486%. Titik pemesanan kembali (r) bahan baku ethylene 12.253 MT dan butene-1 9.448 MT. Untuk persediaan pengaman (Ss) bahan baku ethylene 6.170 MT dan butene-1 4.896 MT. | |||||||||
| Subjects: | T Technology > T Technology (General) T Technology > TS Manufactures |
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| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 26201-Jurusan Teknik Industri |
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| Depositing User: | Mrs Laila Fitriani | |||||||||
| Date Deposited: | 13 Jan 2023 09:49 | |||||||||
| Last Modified: | 13 Jan 2023 17:31 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/19766 |
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