The objective of this research was to determine the optimal maintenance time interval for the selected critical components and the total cost of maintenance of a plastic injection machine. In determining the critical components, a risk matrix was used, and three components were selected, namely, hydraulic hose, barrel, and motor. Using the Reliability and Risk Centered Maintenance (RRCM) method, the researchers got a proposed maintenance policy and the total maintenance cost. Based on the result, it shows that there are seven proposed maintenance tasks with three scheduled oncondition tasks and four scheduled restoration tasks with an average maintenance interval of two months. The total maintenance cost proposed is IDR91.595.318. The cost is smaller compared to the actual maintenance costs of the company.
CV. XYZ merupakan perusahaan yang menyediakan jasa jig, dies, mold, dan sparepart terutama pada mold product dan injeksi plastik. Salah satu peralatan yang dibutuhkan untuk menunjang kegiatan usaha CV. XYZ adalah mesin injeksi plastik. Mesin injeksi plastik merupakan mesin yang digunakan oleh CV. XYZ untuk produksi dan memenuhui pesanan yang diminta sehingga mesin injeksi plastik ini beroperasi selama 24 jam terus menerus. Dalam menentukan komponen kritis dari mesin injeksi plastik, pada penelitian ini menggunakan Risk Matrix dan terpilih tiga komponen yaitu selang hidrolik, barrel dan motor. Menggunakan metode RRCM maka didapatkan kebijakan maintenance dan total biaya maintenance-nya. Berdasarkan hasil pengumpulan dan pengolahan data, maka didapatkan hasil bahwa terdapat 7 proposed maintenance task dengan 3 scheduled on-condition task, 4 scheduled restoration task dengan interval waktu rata-rata maintenance adalah dua bulan. Total biaya maintenance usulan sebesar Rp 91,595,318 dimana biaya tersebut lebih kecil Rp 10,177,258 dibandingkan dengan biaya maintenance eksisting perusahaan.
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