DOI: https://doi.org/10.14710/jati.19.2.58-69

OPTIMASI PERENCANAAN PRODUKSI AGREGAT PRODUK TUNGGAL DENGAN MEMPERTIMBANGKAN KAPASITAS PRODUKSI

*Denny Suci Prastiya  -  Department of Industrial Engineering, Universitas Gunadarma, Jl. Margonda Raya No. 100, Depok, Jawa Barat, Indonesia 16424, Indonesia
Rossi Septy Wahyuni scopus  -  Department of Industrial Engineering, Universitas Gunadarma, Jl. Margonda Raya No. 100, Depok, Jawa Barat, Indonesia 16424, Indonesia

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Abstract

Pertumbuhan pada industri air minum dalam kemasan mengalami peningkatan secara signifikan. Peningkatan pada industri air minum dalam kemasan dipengaruhi oleh tingginya permintaan akan produk air minum bersih. PT X pada studi kasus ini mengalami fluktuasi permintaan yang diakibatkan tingginya persaingan antara industri sejenis. Oleh karena itu PT X pada studi kasus ini menjalin kerja sama subkontrak dalam memenuhi permintaan. Permasalahan yang dialami oleh PT X adalah meningkatnya harga per unit saat melakukan subkontrak. Tingginya harga unit subkontrak dapat mengakibatkan tingginya biaya perencanaan produksi. Penelitian ini dilakukan untuk meminimasi jumlah unit subkontrak dengan mengoptimalkan produksi internal. Model optimasi dibangun dengan fungsi tujuan linear dan fungsi pembatas non linear sebagai usulan optimasi perencanaan produksi agregat. Di samping itu, berkurangnya jumlah unit subkontrak dapat mengakibatkan tingginya produksi internal perusahaan, sehingga model usulan perlu mempertimbangkan kapasitas produksi. Usulan evaluasi kapasitas dilakukan menggunakan pendekatan rough-cut capacity planning. Berdasarkan hasil optimasi model usulan dapat menghemat biaya perencanaan produksi agregat sebesar 5% dibandingkan dengan kondisi nyata.

 

Abstract

[Optimization of Single Product Aggregrate Production Planning Considering Production Capacity] Bottled drinking water industry growth has increased significantly. The increase in the bottled drinking water industry is influenced by the high demand for clean drinking water products. PT X in this case study experienced fluctuations in demand due to high competition between similar industries. Therefore, PT X established sub-contract cooperation to fulfill demand in this case study. The problem experienced by PT X was when carrying out sub-contract cooperation. The high price per unit of sub-contracted products can result in high production planning cost. The research is conducted to minimize the number of sub-contract units while optimizing internal production. The optimization model was built with a linear objective function and a nonlinear constraint function as an optimization proposal for aggregrate production planning. Besides that, the reduced number of sub-contract units can result in high internal production for the company, therefore it is necessary to consider production capacity. The proposed capacity evaluation is conducted using a rough-cut capacity planning approach. Based on the results of the optimization of the proposed model, it can save 5% of aggregrate production planning costs compared to actual conditions.

Keywords: integer nonlinear programming; production capacity; aggregrate production planning

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Keywords: integer nonlinear programming; kapasitas produksi; perencanaan produksi agregat

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