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All Journal Journal Of World Science Enrichment: Journal of Multidisciplinary Research and Development
Budi Witjaksana
University of August 17, 1945 Surabaya
Humanities Computer Science & IT Economics, Econometrics & Finance Engineering Health Professions Law, Crime, Criminology & Criminal Justice Social Sciences

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Analysis of Improving the Quality of Mass Transportation Services with the Buy the Service (BTS) Scheme Using the Importance Performance Analysis (IPA) Method: Case Study of BTS Route Gresik – Lamongan Diah Mega Alfianti; Hani Teki Tjendani; Budi Witjaksana
Journal of World Science Vol. 4 No. 2 (2025): Journal of World Science
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jws.v4i2.1284

Abstract

Transportation is fundamental to societal function, impacting lifestyles, production, and service accessibility, and it is a cornerstone of urban mobility. This study evaluates the quality of mass transportation services under the Buy The Service (BTS) scheme on the Gresik - Lamongan route using Importance-Performance Analysis (IPA). The research identifies key performance attributes influencing passenger satisfaction using primary data from field observations, passenger surveys, and secondary data from local transportation authorities. Results indicate high satisfaction with safety features like fire extinguishers, glass breaker hammers, and accessibility features such as priority seating for wheelchair users. However, improvements are needed in areas such as bus intervals and operational consistency. The IPA quadrant analysis highlights strategic priorities for enhancing service quality. Recommendations include prioritizing safety, optimizing accessibility, and leveraging technology to improve reliability and efficiency. These findings offer policymakers and transportation operators insights to enhance service delivery and meet diverse passenger needs.
Risk Mitigation Analysis in the Construction of Dormitories for Students of Riyadlus Sholihin Islamic Boarding School, Probolinggo City Febri Aditya; Budi Witjaksana; Sajiyo Sajiyo
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 4 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i4.454

Abstract

The implementation of construction projects often faces various risks that can lead to delays, cost overruns, and decreased quality of work. One example occurred in the project to build a dormitory for students of the Riyadlus Sholihin Islamic Boarding School in Probolinggo City, which experienced a time deviation despite acceleration efforts. This shows the importance of implementing systematic risk management to identify and address potential risks from the beginning of project implementation. This study uses a descriptive quantitative approach through the dissemination of questionnaires and interviews to related parties in the project. The analysis was carried out using the Severity Index method to calculate the level of probability and impact of each risk, as well as the probability and impact matrix to determine the level of risk significance. The dominant risk is then further analyzed to determine mitigation actions. The results of the study showed five risks with a "Very High" level, namely the preparation of the wrong work method, poor coordination between parts, the accuracy of completing work within a certain duration, poor planning and scheduling, and low labor productivity. Mitigation strategies are developed to reduce the impact of these risks, including through training, improved communication, the use of planning software, and strengthening the monitoring system. This research makes a real contribution to the risk management of construction projects in a more effective and structured manner.
Analysis of the Acceleration of Implementation Time Using the Crashing Method in the Construction of the Purworejo Bridge, Mojokerto Regency Muchamad Farchan; Budi Witjaksana; Sajiyo Sajiyo
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 4 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i4.458

Abstract

Bridge infrastructure plays an important role in supporting connectivity and regional economic growth. However, in their implementation, bridge construction projects often face delays due to technical factors such as weather, soil conditions, as well as managerial and coordination constraints. One of them occurred in the Purworejo Bridge construction project in Mojokerto Regency which experienced a delay in progress of -14.88% in the 12th week of implementation. This delay requires accelerated efforts so that the project is not included in the critical contract category. This study seeks to examine the approach of accelerating implementation time through the Crashing method through increasing working hours (overtime) and calculating costs efficiently to mitigate delays. The methodology used includes the formulation of a network using Microsoft Project, the identification of critical paths through the Critical Path Method (CPM), and the calculation of acceleration costs based on Cost Slopes. The results of the analysis show that the acceleration of work can be achieved both technically and economically. This method allows the project to reduce delays, thus removing them from the classification of vital contracts. The study significantly improved the decision-making process for the timely and cost-effective implementation of development projects.
Analysis of Construction Costs on the Improvement of the Dupak Road Section in Surabaya City Reza Adiputra; Esti Wulandari; Budi Witjaksana
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 4 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i4.459

Abstract

The rapid growth of traffic in urban areas, especially on the Jalan Raya Dupak Surabaya section, has a significant impact on the decreasing age of road pavement plans and increasing the need for construction costs. This study aims to analyze and calculate the estimated cost of improving the Dupak road section in Surabaya City. Methods Analysis of average daily traffic data (LHR), calculation of single axle equivalent load (ESAL), and rigid pavement structure design taking into account the underlying soil conditions and projected traffic load over the life of the plan of 40 years. The results of the study show that traffic growth of 5.6% per year leads to a significant decrease in the life of the plan if it is not anticipated with the right pavement design. The estimated cost of road improvement reaches Rp 11,513,568,000.00. It is hoped that this research will help in planning the improvement of urban arterial roads to maintain the sustainability and efficiency of transportation infrastructure
Co-Authors Diah Mega Alfianti Esti Wulandari Febri Aditya Hani Teki Tjendani Muchamad Farchan Reza Adiputra Sajiyo Sajiyo