Lizautami, Nenden (2019) Perencanaan Produksi Semen Tipe Baru Menggunakan Metode Linear Programming (Studi Kasus: PT. Holcim Indonesia Tbk. Narogong Plant). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
PT. Holcim Indonesia Tbk. merupakan salah satu produsen semen di Indonesia yang baru saja mengeluarkan produk baru yaitu Power Max, Green Cement, dan Wall Max yang hanya di produksi di Narogong Plant. Setelah produk semen tipe baru diluncurkan ke pasaran, ditemukan beberapa permasalahan yaitu adanya perbedaan yang cukup signifikan antara jumlah produksi yang sesungguhnya dengan permintaan yang diramalkan sebelumnya. Selain adanya kesenjangan antara aktual produksi dengan peramalan permintaan, permintaan produk semen tipe baru juga bersifat fluktuatif. Fluktuasi permintaan sangat berpengaruh terhadap akurasi peramalan yang dilakukan oleh perusahaan. Tidak akuratnya peramalan permintaan dan adanya kesenjangan antara aktual produksi dengan peramalan permintaan akan mengakibatkan produksi terlalu sedikit atau kelebihan produksi sehingga berdampak pada perencanaan produksi yang tidak tepat dan biaya-biaya yang dikeluarkan perusahaan akan jauh lebih tinggi. Salah satu cara yang dapat digunakan untuk mengatasi masalah tersebut adalah dengan melakukan optimasi jumlah produksi untuk meminimalkan biaya produksi semen menggunakan metode linear programming dengan kendala jumlah produksi, tingkat persediaan, dan jam tenaga kerja. Oleh karena itu, penelitian ini bertujuan untuk menentukan metode peramalan yang tepat dan memodelkan perencanaan produksi semen tipe baru menggunakan metode linear programming. Hasil penelitian menunjukkan bahwa metode peramalan yang tepat untuk produk Power Max dan Green Cement adalah holt’s linear exponential smoothing, dan metode exponential models adalah metode yang tepat untuk produk Wall Max. Hasil optimasi menunjukkan total produksi semen tipe baru sebesar 52.7399,18 ton dengan total biaya mencapai Rp54.091.080.860,00 dengan rincian biaya produksi sebesar Rp53.161.093.279,00, biaya penyimpanan Rp828.627.166,00, biaya tenaga kerja reguler Rp91.704.099,00, dan biaya tenaga kerja lembur Rp9.611.317,00.
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PT. Holcim Indonesia Tbk. is one of the cement producers in Indonesia that has just issued several new products, namely Power Max, Green Cement, and Wall Max which are only produced at PT. Holcim Indonesia Tbk. Narogong Plant. After a new type of cement product was launched into the market, several problems were found, namely a significant difference between the actual number of production and the previously forecasted budget. In addition to the gap between actual production and demand forecast, the demand for new types of cement products is also volatile. Demand fluctuations greatly affect the accuracy of forecasting carried out by the company. Inaccurate demand forecasting and the gap between actual production and forecast demand will result in too little production or excess production so that it impacts on improper production planning and the costs incurred by the company will be much higher. One way that can be used to overcome this problem is to optimize the amount of production to minimize the cost of producing cement at PT. Holcim Indonesia Narogong Plant by using linear programming methods. Therefore, this study aims to determine the right forecasting method and model the new type of cement production planning using linear programming methods. The objective function to be achieved by the company is minimizing production costs with constraints on the number of production, inventory levels, and labor hours. The results showed that the right forecasting method for Power Max and Green Cement products is holt linear linear smoothing, and exponential models are the right method for Wall Max products. The optimization results show a total new type of cement production of 52.7399,18 tons with a total cost of Rp54.091.080.860,00 with details of production costs of Rp53.161.093.279,00, storage costs Rp828.627.166,00, regular labor costs Rp91.704.099,00, and overtime labor costs Rp9.611.317,00.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMB 658.503 Liz p-1 2019 |
| Uncontrolled Keywords: | linear programming, optimasi, peramalan, perencanaan produksi |
| Subjects: | T Technology > T Technology (General) > T57.6 Operations research--Mathematics. Goal programming T Technology > TS Manufactures > TS155 Production control. Production planning. Production management |
| Divisions: | Faculty of Business and Management Technology > Business Management > 61205-(S1) Undergraduate Thesis |
| Depositing User: | Nenden Lizautami |
| Date Deposited: | 10 Aug 2021 07:14 |
| Last Modified: | 10 Aug 2021 07:14 |
| URI: | http://repository.its.ac.id/id/eprint/61196 |
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