PENERAPAN METODE SIMPLEKS DALAM OPTIMASI BIAYA PENGGUNAAN ALAT BERAT PADA PEKERJAAN CUT AND FILL PROYEK WORKSHOP PT. INKA PERSERO

The Engineering, Procurement, Construction, Commissioning (EPCC) project of the train workshop in Banyuwangi has an area of 83 hectares, and 30 Ha. The project area has uneven elevation contours, so cut and fill work is necessary. Cut and fill works require the use of heavy equipment so that the implementation can be completed according to the schedule and can optimize costs without neglecting the time to be achieved. The purpose of this study was to apply the simplex method in optimizing the cost of using heavy equipment in cut and fill work at the PT INKA Persero. The results of the application of the simplex method in optimizing the cost of using heavy equipment in cut and fill work for excavation work in combination 4 with excavator type 2 with a total of 3 units, dump truck type 1 with a total of 6 units, and bulldozer type 1 with a total of 2 units, with a total cost of Rp.4.955.077.432. For the optimal alternative tools for embankment work, namely alternative combinations of 4 by using excavator type 2 totaling of 2 units, dump trucks type 1 totaling of 3 units, bulldozer type 1 totaling 1 unit, vibro roller totaling 1 unit, and water tank truck totaling 1 unit, with the total cost of Rp. 3,403,048.016.