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All Journal Formosa Journal of Science and Technology (FJST)
Dika Ayu Safitri
Civil Engineering Master's Study Program, Faculty of Engineering Universitas 17 Agustus 1945 Surabaya
Humanities Computer Science & IT Education Industrial & Manufacturing Engineering Social Sciences

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Housing Development Performance Evaluation Through the Earned Value Technique (Case Study: Safira Gold Mansion, Appenzel Model, Two-Story Home) Axel Prasetya Adoe; Budi Witjaksana; Dika Ayu Safitri
Formosa Journal of Science and Technology Vol. 5 No. 6 (2026): June 2026
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v5i6.91

Abstract

Project performance control requires an approach that quantitatively integrates planning and implementation. Earned Value Management is used as a method to evaluate cost and time performance through the Cost Performance Index (CPI) and Schedule Performance Index (SPI) indicators.  Therefore, it is necessary to implement EVM that not only focuses on evaluating performance indicators numerically, but is also able to represent the actual conditions of the project based on implementation data, so that the analysis of project performance deviations can be carried out more comprehensively and contextually according to the characteristics of the housing project being studied. The results of the project cost performance analysis using the Cost Performance Index (CPI) indicator, the project experienced inefficiency in implementation costs. In the 43rd week, the CPI value was obtained at 0.64, indicating that the actual costs used were greater than the value of the work successfully achieved. The results of the Cost Variance (CV) calculation showed a negative value of Rp149,531,847,789, indicating that the project cost overrun occurred. In addition, the results of the Estimate at Complete (EAC) calculation showed that the estimated final project cost had increased compared to the initial project plan cost. This condition was influenced by increased operational costs due to delays in project duration, increased work implementation costs, and suboptimal use of project resources during the project implementation process.
In a Commercial Restaurant Construction Project in Eastern Indonesia, Alternative Materials Based on Value Engineering for Architectural Work Putri Dwi Rahayu; Budi Witjaksana; Dika Ayu Safitri
Formosa Journal of Science and Technology Vol. 5 No. 6 (2026): June 2026
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v5i6.84

Abstract

Commercial construction projects in Eastern Indonesia have to deal with high costs for getting materials, difficult transportation issues, and a Construction Cost Index that is much higher than the average for the whole country. This study looks into the following question: What different building designs and materials can be suggested using Value Engineering (VE) for the Mie Gacoan Sorong–Nangka restaurant construction project, while still making sure the building works as well as it was planned to.  A descriptive quantitative method was used, based on the SAVE International six-phase Job Plan. During the function analysis stage, the Cost-to-Worth Ratio (C/W) was used to find granite tile products that had extra costs, which means their C/W was higher than 1.00.. The suggested options were Asia Tile Brown Oak, Granite Tile Grey Matte Lokal, Arna Wood Plank Brown Walnut, Essenza Absolute Black, and Asia Tile Outdoor Wood Brown.  All other options worked just as well as the floor coverings and looked good together with the restaurant's modern industrial style. A Life Cycle Cost (LCC) analysis over 10 years, using a 6% discount rate, showed that the alternatives were more economical. The analysis found cost savings of between 25.55% and 26.81% for each pair of materials. The total cost saved from implementing VE reached IDR 12,665,548.50, which is 21.81% of the existing granite tile budget that was reviewed. These results show that VE is a useful and real-world method for choosing the best building materials in commercial restaurant projects in Eastern Indonesia, where there are specific transportation and supply challenges
Co-Authors Axel Prasetya Adoe Budi Witjaksana Putri Dwi Rahayu