Analisa Pengaruh Perubahan Produksi Tenaga Kerja dan Alat Terhadap Waktu Penyelesaian, Biaya, dan Keuntungan Proyek

NANA, Maria Kristianti (2025) Analisa Pengaruh Perubahan Produksi Tenaga Kerja dan Alat Terhadap Waktu Penyelesaian, Biaya, dan Keuntungan Proyek. Undergraduate thesis, Universitas Katolik Widya Mandira.

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Abstract

Minimum production is the smallest output that can be produced by a group of workers and equipment working together to complete a task within a specified timeframe, such as hours or days. If minimum production is focused on labor, then tools will not be used. Conversely, if this situation occurs on tools, then the workforce will be unproductive. From minimum production, we can calculate the completion time by dividing the total volume of existing work by the minimum production. If the minimum production is low, the coefficient value will increase, which will result in increased completion time, increased project costs, and decreased profits. As production increases, the coefficient will decrease, the analysis of the price per unit becomes lower, resulting in faster completion time, reduced project costs, and increased project profits. This study aims to examine how changes in labor and equipment production impact the completion time, costs, and profits of a project by simulating changes between -20% and +20%, with a 2% interval. The analysis results from this study indicate that the completion time for stone laying work with mortar at a minimum labor and equipment production condition of 0% is 38.19 m³, which requires 0.60 days to complete. However, when the product decreases to -20% to 30.55 m³, the completion time increases to 0.76 days; on the other hand, if the minimum production of labor and tools increases to +20% to 45.83 m³, the completion time decreases to 0.50 days. For a normal project cost of Rp. 2,023,963,036.90, when the simulation shows a decrease in labor production by -20%, the project cost increases by 15.17% to Rp. 2,331,087,135.52. Meanwhile, if production increases by +20%, the project cost actually decreases by -3.05% to Rp. 1,962,132,850.29. When the simulation shows a decrease in tool production by -20%, the project cost increases by 13.18% to Rp. 2,290,708,230.24; whereas if there is an increase of +20%, the project cost decreases by -4.38% to Rp. 1,935,213,580.10. Regarding profit, the normal profit is Rp. 202,396,303.69; however, in the simulation of a decrease in labor production by -20%, the project experiences a loss of -151.74% to Rp. -104,727,794.93. Conversely, when labor production increases by +20%, profits increase by 30.55% to Rp. 264,226,490.30. In the simulation of a decrease in tool production by -20%, there is a loss of -131.79% to Rp. - 64,348,889.65; while if tool production increases by +20%, profits increase by 43.85% to Rp. 291,145,760.49.

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