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All Journal INJURITY: Journal of Interdisciplinary Studies Jurnal Teknik Indonesia JRSI (Jurnal Rekayasa Sistem dan Industri)
Jaka Purnama
Universitas 17 Agustus 1945 Surabaya, Indonesia
Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Public Health Social Sciences Transportation

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Analysis of Project Time Acceleration Using The Crashing Method in The Rehabilitation Project of SMPN 2 Pasongsongan, Sumenep District Moh Ali Lutfi M. K.; Budi Witjaksana; Jaka Purnama
Interdiciplinary Journal and Hummanity (INJURITY) Vol. 4 No. 4 (2025): INJURITY: Journal of Interdisciplinary Studies.
Publisher : Pusat Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58631/injurity.v4i4.1403

Abstract

Delays in construction projects often result in increased costs and inefficiencies, which can negatively impact project management and resource allocation. To address these issues, this study analyzes project duration acceleration using the Crashing Method by incorporating overtime work hours and additional workforce into the rehabilitation project of SMPN 2 Pasongsongan, Sumenep Regency. This research aims to determine the extent of time reduction achievable when implementing a 3-hour overtime strategy and increasing the workforce simultaneously. Utilizing Microsoft Project 2016, the study compares the original 150-day schedule with an accelerated version using the Crashing Method. The results indicate that the project duration can be reduced to 140 days, saving 10 days. However, this acceleration incurs an additional cost of IDR 21,566,522, primarily due to labor expenses and extended work hours. The study further examines the trade-offs between time efficiency and cost implications, highlighting the importance of effective resource management in construction projects. Findings suggest that the Crashing Method is an effective strategy for project acceleration, provided that cost-benefit analysis, workforce efficiency, and resource availability are carefully considered. The study also emphasizes that proper coordination among project stakeholders, optimized scheduling, and proactive risk assessment are critical for ensuring that acceleration does not compromise work quality or safety standards. By offering insights into the practical application of the Crashing Method, this research serves as a valuable reference for project managers and construction planners seeking to improve time efficiency while maintaining budget control in infrastructure projects.
Analysis of Workforce Workload for Production Efficiency Improvement in Sandal Manufacturing Using Workload Analysis and Cardiovascular Load Methods Hilbram Ramadaniel Setiawan; Jaka Purnama
JRSI (Jurnal Rekayasa Sistem dan Industri) Vol. 13 No. 01 (2026): Jurnal Rekayasa Sistem & Industri
Publisher : Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jrsi.v13i01.11115

Abstract

This study aims to analyse workforce workload and determine the optimal number of workers in the sandal production process at UD. Al Athyyah Mojokerto using the Workload Analysis (WLA) and Cardiovascular Load (CVL) methods. The company experiences workload imbalances across several production sections, resulting in bottlenecks and the inability to meet production demand. Average monthly demand reaches 5,000 pairs of sandals, whilst actual production only reaches approximately 4,700–4,800 pairs. Data collection was conducted through direct observation, interviews, and stopwatch time studies in the cutting, sewing, assembly, and finishing sections. The collected data were processed to calculate cycle time, standard time, workload percentage, and cardiovascular load values to evaluate both operational and physiological workload conditions. The results show that several workstations are categorised as overloaded, namely Cutting 1 (124%), Sewing 1 (106%), Sewing 2 (117%), Sewing 3 (108%), Sewing 4 (127%), Assembly 3 (102%), and Finishing 2 (105%). Meanwhile, several other activities were classified as underloaded. The CVL analysis indicates that most workers experience moderate to heavy physical workloads, particularly in the sewing and assembly sections, which may lead to worker fatigue and reduced productivity. Based on the analysis results, additional workers are required in overloaded workstations to achieve a more balanced workload distribution and improve production efficiency. The integration of WLA and CVL methods provides a comprehensive evaluation of workforce conditions and supports workforce planning in labour-intensive manufacturing industries.
Analysis of Clean Water Distribution Pipe Implementation Time Using Value Engineering Method in Rungkut Industri Surabaya Ahmad Rois; Esti Wulandari; Jaka Purnama
Jurnal Teknik Indonesia Vol. 5 No. 1 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i1.796

Abstract

Clean water distribution infrastructure projects in industrial areas face significant challenges related to cost efficiency and implementation time, which directly impact project sustainability and operational effectiveness. This study analyzes the cost and time efficiency of the clean water distribution system in the Rungkut industrial area, Surabaya, by applying the Value Engineering (VE) method. The main objective of this study is to evaluate and compare the performance of three commonly used types of pipes—namely HDPE (High-Density Polyethylene), uPVC (unplasticized polyvinyl chloride), and GI (galvanized iron)—to determine the most optimal alternative without reducing the function or quality of the clean water distribution system. Data collection was conducted through a combination of methods: distributing questionnaires to professional respondents in civil engineering and water installation fields, conducting direct interviews with project-related parties, and analyzing technical documents and costs from actual projects. The obtained data were analyzed using the Relative Importance Index (RII) method to assess key aspects such as cost efficiency, ease of installation, and material durability. The results showed that HDPE pipes offer superior cost and time efficiency compared to the others. The cost difference between HDPE and uPVC pipes is Rp1,407,577, while that with GI pipes is Rp731,885. In terms of time, HDPE pipes can reduce implementation duration by up to 39 days compared to uPVC pipes and by 9 days compared to GI pipes.
Analysis of Workforce Requirements Based on Production Capacity and Work Time Utilization to Improve Operational Efficiency at PT XYZ Cantika Agusta Sari Ratna Dewi; Jaka Purnama
JRSI (Jurnal Rekayasa Sistem dan Industri) Vol. 13 No. 01 (2026): Jurnal Rekayasa Sistem & Industri
Publisher : Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jrsi.v13i01.11032

Abstract

The rapid development of the industrial sector requires manufacturing companies to manage resources effectively and efficiently, particularly in workforce allocation and working time utilization, in order to maintain productivity and operational performance. This study was conducted at PT XYZ, a stove manufacturing company, with the aim of analyzing employee workload, evaluating the utilization of working time, and determining the optimal number of workers based on production capacity requirements. Based on preliminary observations, several production divisions were found to experience ineffective working time utilization, resulting in workload imbalances and less optimal operational efficiency. This study applies the Workload Analysis (WLA) method supported by stopwatch time study measurements and the Cardiovascular Load (CVL) method to assess both operational and physical workload conditions. The collected data include work element times, number of workers, production output, non-productive time, and workers’ heart rate measurements. The data were processed through normal time and standard time calculations, performance rating determination, allowance calculations, workload analysis, and workforce requirement evaluation. The results show that all workers were classified within the light workload category based on CVL values below 30%, indicating that the physical workload remained within acceptable limits. Furthermore, the WLA results revealed imbalances in several production divisions, particularly welding and assembly, which required workforce adjustments to improve workload distribution and operational efficiency. By implementing appropriate workload management, the company is expected to reduce ineffective working time, improve labor productivity, and enhance overall operational efficiency.
Co-Authors Ahmad Rois Budi Witjaksana Cantika Agusta Sari Ratna Dewi Esti Wulandari Hilbram Ramadaniel Setiawan Moh Ali Lutfi M. K.