Evaluasi Kemampuan PC1250SP-8R pada Pengupasan Lapisan Overburden dengan Metode Overall Equipment Effectiveness

Kegiatan pengupasan lapisan tanah penutup (overburden) merupakan tahapan penting dalam operasi penambangan batubara karena sangat mempengaruhi ketercapaian target produksi dan efisiensi biaya. PT S telah menetapkan target produksi overburden, namun pada pelaksanaannya target tersebut belum tercapai akibat rendahnya efektivitas kerja alat gali muat. Penelitian ini bertujuan untuk mengevaluasi kemampuan aktual Excavator Komatsu PC1250SP-8R pada kegiatan pengupasan overburden serta mengidentifikasi faktor-faktor penyebab terjadinya kehilangan waktu kerja menggunakan metode Overall Equipment Effectiveness (OEE) dan analisis Six Big Losses. Data yang digunakan merupakan data sekunder periode Januari – November 2025 yang meliputi jam kerja, downtime, cycle time, serta data produksi. Hasil penelitian menunjukkan bahwa nilai average masing – masing availability sebesar 71%, performance sebesar 49%, dan quality sebesar 100%, sehingga diperoleh nilai OEE sebesar 35%, yang masih berada di bawah standar world class OEE (≥85%). Analisis Six Big Losses menunjukkan bahwa kerugian terbesar berasal dari equipment failure losses sebesar 19%, diikuti oleh idling and minor stoppages sebesar 10%, setup and adjustment losses sebesar 5%, dan reduced speed losses sebesar 6%. Berdasarkan analisis diagram fishbone, faktor penyebab utama equipment failure berasal dari aspek machine, method, man, dan environment. Dengan demikian, diperlukan upaya perbaikan melalui peningkatan sistem pemeliharaan, penggunaan komponen sesuai standa OEM, peningkatan kompetensi operator, serta perbaikan metode kerja guna meningkatkan efektivitas alat dan pencapaian target produksi overburden perusahaan.

================================================================================================

Overburden stripping is a critical stage in coal mining operations because it directly affects the achievement of production targets and cost efficiency. PT S has established overburden production targets; however, in practice, these targets have not been achieved due to the low effectiveness of loading equipment. This study aims to evaluate the actual performance of the Komatsu PC1250SP-8R excavator in overburden stripping activities and to identify factors causing working time losses using the Overall Equipment Effectiveness (OEE) method and Six Big Losses analysis. The data used in this study are secondary data for the period January– November 2025, including operating hours, downtime, cycle time, and production data. The results show that the average availability is 71%, performance is 49%, and quality is 100%, resulting in an OEE value of 35%, which is below the world- class OEE standard (≥85%). The Six Big Losses analysis indicates that the largest loss is equipment failure losses at
19%, followed by idling and minor stoppages at 10%, setup and adjustment losses at 5%, and reduced speed losses at 6%. Based on fishbone diagram analysis, the main causes of equipment failure originate from machine, method, man, and environment factors. Therefore, improvement efforts are required through enhancing the maintenance system, using components in accordance with OEM standards, improving operator competence, and refining working methods to increase equipment effectiveness and achieve the company’s overburden production targets.