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Formosa Journal of Science and Technology (FJST)
ISSN : -     EISSN : 29646804     DOI : https://doi.org/10.55927/fjst.v1i2
Formosa Journal of Science and Technology (FJST) is an open-access scientific journal that publishing full-length research papers and review articles covering subjects that fall under the wide spectrum of science and technology. FJST journal is dedicated towards dissemination of knowledge related to the advancement in science and technology. The prestigious interdisciplinary editorial board reflects the diversity of subjects covered in this journal. Under the realm of science and technology, the coverage includes environmental science, pure and applied mathematics, agricultural research and engineering, biology, biotechnology, bioinformatics, management science, business and economics, Healthcare sciences (including clinical medicine, preventive medicine & public health), physics, biophysics, computer science, chemistry and bioengineering, to name a few. Formosa Journal of Science and Technology is published by Formosa Publisher. The journal now brings out monthly publications. It supports the open access policy for making scientific research accessible to one and all.
Arjuna Subject : Umum - Umum
Articles 896 Documents
Tourist Transportation Strategy for Pante Lake Lut Tawar in Central Aceh Region Mareza Bagus Candra Pradana; Hanie Teki Tjendani; Bambang Trigunarsyah
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.v5i6.93

Abstract

The growing level of tourist activities in the Pante Menye Danau Lut Tawar area, located in Central Aceh Regency, is not supported by sufficient public transport options designed for tourism. This research seeks to develop efficient routes, create operational frameworks, and evaluate Vehicle Operating Costs (VOC) along with suitable fares for eco-friendly tourist transport. The analysis of route selection and macroscopic transport modeling was conducted using PTV Visum and ArcGIS software via the PuT Assignment method. After simulating the route network load with PTV Visum, it is suggested to operate Route 1 (through Kebayakan) over a distance of 23 km, using a small bus with a capacity for 14 passengers. The operational schedule is intended for 10 hours each day (07. 00 - 17. 00 WIB), aiming for a speed of 40 km/hour.  Based on the analysis using Visum software, the best route for Pante Menye Lake Lut Tawar tourist transportation was selected, namely Route 1 (via Kebayakan), by visually observing the resulting load. Route 1 (via Kebayakan) is 23 km long. This route serves: Jl. Pengulu Gayo - Jl. Lebe Kader - Jl. Abdul Wahab - Jl. Sp. Kebayakan-Bintang. The recommended vehicle type to meet tourist needs and is adjusted to the road dimensions is a Small Bus with a capacity of 14 passengers. The tourist transportation operates 10 hours per day (7:00 AM - 5:00 PM) WIB. The Pante Menye tourist transportation operates at an operating speed of 40 km/h. This route has a travel time of 35 minutes. The number of vehicles required is four with an 18-minute headway
Analysis of Operational Performance and Investment Costs of AKDP Bus Services (Madiun-Ponorogo Route) Using Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP), and Break Event Point (BEP) Methods Irma Kamaliah; Budi Witjaksana; Hanie Teki Tjendani
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.v5i6.92

Abstract

The decrease in public enthusiasm for public transport, driven by a rise in private vehicle usage and other transport options, has led to a review of the effectiveness and quality of public transit services. This study aimed to evaluate the operational efficiency and significance of the Madiun-Ponorogo intercity bus (AKDP) line, as well as to assess the potential for making investments to enhance service quality. The research employed a descriptive quantitative approach. The examination utilized operational performance metrics, while the assessment of investment was carried out using methods such as Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP), and Break Even Point (BEP). Findings indicated that the operational performance of the Madiun-Ponorogo intercity bus route remains inadequate, illustrated by lengthy intervals between buses that lead to extended waiting periods. The investment assessment was deemed financially viable, denoted by a positive NPV, an IRR that exceeds the 6% interest, a Payback Period occurring by the fifth year with a net gain of Rp 578,131,790, and a BEP that surpasses the established minimum in both unit and monetary values
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.
Implementation of Risk-Based Quality Management (RBQM) in Controlling Quality and Cost Risks in the Widening Work of Hang Tuah Street, Airport Intersection-Batu Besar Intersection Section In Batam City Martina Magdalena Tuulima; Hanie Teki Tjendani; Bambang Trigunarsyah
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.v5i6.90

Abstract

A disproportionate quality cost structure was created as a result of the systematic failure to use RBQM, where failure costs far outweighed the initial expenditures in prevention. The entire recorded quality charges came to Rp2,527,699,700.32, which is 3.70% of the Rp68,284,483,721.22 final contract value. The real project failure costs are projected to be significantly higher than the stated value since Prevention Costs and Internal Failure Costs were not recorded as distinct categories. The external failure costs of Rp980,049,700.32 were equal to more than half of the entire supervision investment made, as shown by the ratio of external failure costs to appraisal expenses reaching 63.3%. Rp726,113,833.42, or 74.1%, of this sum. According to the relationship pattern discovered, risks that are not identified until the project is finished result in External Failure Costs (EFC), whereas risks that are fixed during implementation still result in Internal Failure Costs (IFC), which are absorbed in project overhead and are not explicitly documented. In the case of road infrastructure projects, the two aforementioned results show that the RISK → QUALITY → COST chain is a tangible and quantifiable causal mechanism rather than just a theoretical framework. Inadequate RBQM implementation immediately leads to quality failures that go unnoticed, which eventually results in expenses that are significantly higher than those that might have been avoided in the first place
Priorities for Road Infrastructure Maintenance in a Case Study of Kepanjen Regency Roads Using SWOT Analysis and the Analytical Hierarchy Process (AHP) I Ketut Nagageni; Ony Frengky Rumihin; Iswandaru Widyatmoko
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.v5i6.89

Abstract

Road pavement damage due to traffic loads can manifest in various forms, such as alligator cracking, longitudinal cracking, transverse cracking, potholes, rutting, and surface peeling. Therefore, prioritization is necessary for each road section within a single road maintenance program and activity. Addressing this challenge requires a comprehensive analytical approach to prioritize road infrastructure maintenance and improvement. The purpose of this study is to generate priority recommendations based on the analysis to support decision-making. The analysis found that the Blitar Regency-Kepanjen Highway Section is the first priority, followed by the Kepanjen-Gondanglegi Highway Section as the second priority, followed by the Wlingi City-Malang Regency Highway Section, and the Gondanglegi-Turen Highway Section as the last priority. It is also recommended that adjustments be made to the road maintenance priority criteria variables if this decision model is to be applied outside the Kepanjen Regency area and to deepen the comparative study regarding the reliability of the decision support system or software used in mapping the order of road preservation urgency
Assessment of Precast Structural Design for Economy and Time Savings in the Borong Hospital Design and Build Initiative Aldo Salam Lubis; Ony Frengky Rumihin; Buntara Sthenly Gan
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.v5i6.88

Abstract

The erection of hospital edifices necessitates building techniques that fulfill the criteria for excellence, economical expenditure, and swift project finalization. One strategy that is commonly utilized is the adoption of precast concrete frameworks, which are seen as effective in enhancing productivity and shortening the period of on-site construction. This research intends to assess how the integration of a precast structural framework influences cost and time efficiency within the Borong Hospital Design and Build Initiative. The study utilized a quantitative descriptive approach by performing a comparative investigation between precast structural design and traditional structural design, focusing on working blueprints, cost projections (RAB), and project timelines. The evaluation centered on primary structural elements, such as columns, beams, and floor slabs, to ascertain the degree of cost savings and time efficiency achieved. The findings demonstrate that the use of precast structures can lead to a decrease in the timeline for structural tasks, as the manufacturing process occurs concurrently with on-site construction activities, enhancing project time efficiency by a total of 46 days, which is equivalent to 20.91%. Moreover, the incorporation of precast structures offers cost advantages due to diminished needs for formwork, labor, and wastage of construction materials, leading to savings of IDR 1,150,515,798.29, representing 5.18% of the overall structural expenditure. Hence, precast structural design can be regarded as a viable option for enhancing the performance of construction endeavors, especially in hospital projects that demand high quality standards and strict deadlines
Analytical Hierarchy Process (AHP) and SWOT Analysis of Road Infrastructure Maintenance Priorities (Case Study of Roads in Kepanjen Regency) I Ketut Nagageni; Ony Frengky Rumihin; Iswandaru Widyatmoko
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.v5i6.87

Abstract

Road pavement damage due to traffic loads can manifest in various forms, such as alligator cracking, longitudinal cracking, transverse cracking, potholes, rutting, and surface peeling. Addressing this challenge requires a comprehensive analytical approach to prioritizing road infrastructure maintenance and improvement. The purpose of this study was to determine the priority criteria for determining road infrastructure maintenance in Kepanjen Regency. Data analysis was conducted in two main stages: road condition analysis and the application of the AHP and SWOT methods. Five criteria were used to prioritize road maintenance in Karanganyar Regency: road condition, maintenance costs, average daily traffic, and a SWOT analysis. The SWOT analysis was divided into four sub-criteria: strengths, weaknesses, opportunities, and threats. The road condition criterion was the most influential criterion in determining road maintenance priorities in Kepanjen Regency. The next criteria are maintenance costs, average daily traffic volume, and a SWOT analysis. It is also recommended that adjustments be made to the road maintenance priority criteria if this decision model is to be implemented outside of Kepanjen Regency
Road Handling Priority Analysis Using the Analytical Hierarchy Process (AHP) Approach for East Java Provincial Road Sections in Gresik Regency Based on the PKRMS (Provincial/District Road Management System) Fajar Ilman Tama; Ony Frengky Rumihin; Iswandaru Widyatmoko
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.v5i6.86

Abstract

The objective is to analyze the results of provincial road management priorities in Gresik Regency based on the PKRMS application, a government-developed road management system. This aims to obtain an objective picture of the condition of the provincial road network and to compare and integrate the prioritization results between PKRMS and AHP. The results of road maintenance prioritization using the PKRMS application show that the technical priority for road maintenance differs from the cost requirement. Based on the TPI value, section 112 Petiyin–Karangcangkring is the first priority with a value of 83.7, followed by section 110 Surabaya City–Driyorejo–Legundi with a value of 76.2, and section 111 Legundi–Mojokerto Regency with a value of 24.5. However, based on maintenance work (MW), section 110 has the largest cost requirement, making it the section with the highest financing burden. Recommendations: Prioritization should be based not only on the cost of the work but also on the TPI value, AHP criteria weighting, road conditions, traffic volume, connectivity function, and the role of the road section in industrial and logistics areas
Analytical Hierarchy Process (AHP) Road Handling Priority Analysis for East Java Provincial Road Sections in Gresik Regency Drawing from the Provincial/District Road Management System (PKRMS) Fajar Ilman Tama; Ony Frengky Rumihin; Iswandaru Widyatmoko
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.v5i6.85

Abstract

The AHP method used in this study was used. The AHP questionnaire instrument in this study was structured as a table of pairwise comparisons between criteria. Each criterion was compared with the others using a scale of 1 to 9. The PKRMS results without AHP integration indicate that section 112 is the first priority with a TPI of 83.7. Section 110 is the second priority with a TPI of 76.2. Section 111 is the third priority with a TPI of 24.5. Based on the MW value, section 110 has the highest cost requirement, at IDR 77,415.4 million. However, using the TPI as the basis for technical prioritization, section 112 remains the top priority. After the PKRMS-AHP integration, the technical priority order remains with section 112 as the first priority with a TPI of 24.9, followed by section 110 with a value of 22.5, and section 111 with a value of 7.5. However, in terms of five-year cost requirements, section 110 remains the section with the largest MW value, amounting to Rp57,742.9 million, followed by section 111 at Rp22,200.3 million, and section 112 at Rp9,005.9 million. As for the recommendations, determining priorities should not only be based on the amount of work costs required, but also pay attention to the TPI value, AHP criteria weight, road conditions, traffic volume, connectivity function, and the role of the road section in industrial and logistics areas
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

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