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Trio Pendekar Lonan
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Optimasi Waktu dan Biaya pada Pembangunan Gedung Rawat Inap Rumah Sakit Budi Mulia Bitung Menggunakan Time-Cost Trade-Off (TCTO) Method Adri Aprili Moriolkossu; Geertje Efraty Kandiyoh; Trio Pendekar Lonan
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9780

Abstract

A construction project may experience delays that could result in the project being completed late; therefore, acceleration is needed to optimize time and estimate the resulting cost increases. One method that can be used to optimize duration and costs is the Time-Cost Trade-Off (TCTO) method. In this method, changes in the project’s completion time will also affect the costs incurred. For the construction project of the Budi Mulia Hospital inpatient building in Bitung, planning was carried out by adding overtime hours. This study aims to identify the most optimal scenario among three options: extending the work duration by 1 hour, 2 hours, and 3 hours. As can be seen from the table and graph above, I conclude that the scenario involving a 2-hour extension is the most optimal for this project because the difference in duration between the 2-hour extension and the normal schedule is 11 working days, with a total cost difference of Rp161,280,998; therefore, I choose the 2-hour extension. The reason I did not choose the 3-hour workday option is that, although the project would be completed 4 days earlier and the cost for the 3-hour extension is Rp147,607,753, when compared to the 2-hour extension, the duration difference is 4 days, but the cost increase is Rp13,673,244; therefore, I chose the scenario with a 2-hour extension (overtime).
Analisis Kinerja Biaya dan Waktu dengan Metode Earned Value pada Tahap Awal Pelaksanaan Proyek Pembangunan RSUD Bolaang Mongondow Selatan Claudia Syallomitha Suwu; Trio Pendekar Lonan; Syanne Pangemanan
Jurnal Penelitian Rumpun Ilmu Teknik Vol. 5 No. 2 (2026): Jurnal Penelitian Rumpun Ilmu Teknik
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juprit.v5i2.7074

Abstract

This study applies the earned value method to the early implementation stage of the integrated design and build package for the construction of the Bolaang Mongondow Selatan Regional General Hospital building, valued at IDR 128.64 billion with a contract duration of 287 calendar days. The data consist of the bill of quantities, the master schedule, and the weekly progress reports of weeks one through five. Because the contractor did not release its cost records, the actual cost of work performed was approximated from labour, equipment, and material quantities recorded in the daily reports, multiplied by the unit prices stated in the project cost documents. At the end of week five the cumulative physical progress reached 2.0297 percent against a planned 1.4273 percent, producing a positive schedule variance of IDR 774,938,314 and a schedule performance index of 1.422. The estimated direct cost incurred amounted to IDR 364,565,960. The resulting cost performance index of 7.162 cannot be read as cost efficiency because the estimated cost covers fewer components than the earned value does. The study also finds that zero planned weight across two holiday weeks inflates the schedule performance index.
Co-Authors Adri Aprili Moriolkossu Claudia Syallomitha Suwu Geertje Efraty Kandiyoh Syanne Pangemanan