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All Journal Rekayasa Teknik Sipil AGREGAT G-Tech : Jurnal Teknologi Terapan Jurnal Teknik Industri Terintegrasi (JUTIN) Jurnal Ekonomika dan Bisnis Islam Jurnal Pengabdian Masyarakat Bhinneka IWJ : Inland Waterways Journal Jurnal Pengabdian Masyarakat dan Riset Pendidikan Jurnal Teknik Sipil
Firmansyah, Mochamad
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Analisis Risk Barriers and Mitigation Strategies for High-Rise Building Delays in Surabaya Using Fuzzy Logic Dhani, Ninda Qurmaulia; Beatrix, Michella; Firmansyah, Mochamad
G-Tech: Jurnal Teknologi Terapan Vol 10 No 2 (2026): G-Tech, Vol. 10 No. 2 April 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i2.9154

Abstract

Delays in high-rise building projects negatively affect cost, quality, and schedule performance. This study aims to identify the main risk barriers and formulate appropriate mitigation strategies using a fuzzy logic approach. Data were collected from 80 valid respondents occupying strategic and operational roles in construction projects in Surabaya. Linguistic assessments (Low, Medium, High) were converted into Triangular Fuzzy Numbers and defuzzified using the centroid method to obtain crisp severity scores. The results indicate that cost overruns due to design revisions by the project owner (D4) represent the most critical risk barrier, with a defuzzification score of 3.717 (high category), followed by ineffective project control (E1) with a score of 3.483 (upper-medium category). The severity gap between D4 and the overall average of other indicators (≈3.30) shows a dominant external risk influence of approximately 0.40 points on the 1–5 fuzzy scale. Mitigation preferences reveal that risk avoidance is the dominant strategy for D4 (34 respondents), emphasizing design finalization before construction, while risk reduction is dominant for E1 (37 respondents), highlighting intensive monitoring and routine progress evaluation. Practically, prioritizing risks above the 3.50 threshold provides a structured basis for focusing managerial attention on the most critical delay drivers. Theoretically, this study demonstrates that fuzzy logic enhances decision accuracy by transforming subjective expert judgments into measurable and ranked risk severity values for high-rise construction projects.
Faktor Pengaruh Penerapan Keselamatan dan Kesehatan Kerja (K3) pada Proyek Pembangunan Struktur Gedung XYZ di Kota Surabaya Mubin, Muhammad Fadhul; Beatrix, Michella; Firmansyah, Mochamad
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.57916

Abstract

High-rise building construction projects have a high risk of occupational accidents, particularly for field workers. Therefore, the implementation of a well-planned Occupational Safety and Health (OSH) Management System supported by adequate safety facilities is essential. This study aims to analyze the implementation of OSH in the construction project of the XYZ building structure in Surabaya and to identify the dominant influencing factors. The method used is a quantitative approach through questionnaires, with respondents consisting of project staff from contractors and supervising consultants. Data analysis includes validity testing, reliability testing, normality testing, F-test (simultaneous), and T-test (partial). The results show that the factors influencing OSH implementation consist of OSH knowledge (8.97%), OSH management (52.99%), OSH attitudes and behavior (10%), and working conditions and environment (28.04%). The most dominant factor is OSH management, with a percentage of 52.99%.
Faktor Penerapan Metode Penggunaan Teknologi Beton Precast pada Kontruksi di Kota Surabaya Pratama, Arfi Wahyu; Tjendani, Hanie Teki; Firmansyah, Mochamad
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.57987

Abstract

Construction projects are characterized by high complexity and constraints in time, cost, and resources, requiring efficient construction methods. One of the emerging methods is precast concrete. This study aims to identify the factors influencing the implementation of precast methods in construction projects in Surabaya. A quantitative approach was used, with data collected through questionnaires distributed to 50 respondents consisting of contractors and project management personnel. Data analysis was conducted using Partial Least Square (PLS). The results indicate that all indicators have outer loading values > 0.7, AVE > 0.5, and Composite Reliability > 0.7, confirming that the constructs are valid and reliable. The main factors influencing precast implementation include technical, managerial, and human resource aspects, with coordination among project stakeholders identified as the most dominant factor. The findings of this study are expected to support decision-making in selecting more effective construction methods.
Faktor Pemutusan Kontrak pada Proyek Konstruksi Berbasis E-Tendering di Kota Surabaya Putra, Fanji Indrajaya; Beatrix, Michella; Firmansyah, Mochamad
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.57998

Abstract

Contract termination in construction projects is a critical issue that can significantly affect project time and cost performance. This study aims to identify the dominant factors causing contract termination and analyze their impact on construction project performance in e-tendering-based projects in Surabaya. A quantitative approach was applied using questionnaire data collected from 46 respondents, including contractors, consultants, and project personnel. Data were analyzed using descriptive statistics and simple linear regression. The results indicate that delay in work progress is the most dominant factor, and contract termination has a strong influence on project time and cost, with a correlation value of 0.881. Therefore, improving project control and enhancing human resource competence are essential to minimize the risk of contract termination.
Analisis Kerusakan Jalan Flexible Pavement dengan Metode Pavement Condition Index (PCI) pada Jl. Kates – Jl. Gedangrowo Kecamatan Prambon Kabupaten Sidoarjo Fikri, Dzaki Arif; Hartatik, Nurani; Firmansyah, Mochamad
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58026

Abstract

Kates – Gedangrowo Highway located in Prambon District, Sidoarjo Regency is a local road type 2/2 UD with a length of 3.4 km and a width of 8 meters. This road experiences various types of damage such as crocodile cracks, potholes, patches, obesity, sinkholes, cracks on the edge, grain detachment, and longitudinal cracks. The purpose of this study is to identify the type of damage by analyzing the condition of the pavement using the PCI. From the results of the field survey on 34 segments, 10 types of damage were detected with the results of the study showing that there were 255 points of damage with the dominant type of Alligator Cracking of 27.06%, Potholes of 27.06%, and Patching of 20.78%. The average PCI value of the entire road section is 49.8 which is included in the Fair category. However, 12 segments (1,200 meters) were found to be in Failed and Very Poor condition, requiring immediate priority treatment. Treatment recommendations vary, including total reconstruction, rehabilitation with overlays, periodic maintenance, and routine maintenance tailored to the conditions of each segment, using the method as the basis for calculating the Cost Budget Plan.
Co-Authors Ahmad Ajib Ridlwan Andriangsih, Andriangsih Asrul Sani Dhani, Ninda Qurmaulia DWI GRAHA, BARA Fahlefi, Erdin Fatmawati, Laily Endah Fikri, Dzaki Arif Fitri Nugraheni Hanie Teki Tjendani, Hanie Teki Hartatik, Nurani M. Agung Wibowo Michella Beatrix Miftakhul Huda Mubin, Muhammad Fadhul Nurul Rochmah PRAHNALAGA WIRA, TIMUR Pratama, Arfi Wahyu Putra, Fanji Indrajaya Sari, Tri SISWANTO, TONO