Journal Transnational Universal Studies

Implementation of Early Warning System (EWS) Feature on Mobile Tower Battery in Realtime to Reduce Mobile Tower Downtime

Agus Widiyanto — 2026-11-09

Mobile tower network reliability at PT Antareja Mahada Makmur (AMM), Mifa Jobsite, was partially dependent on battery performance. However, the existing monitoring procedures relied on manual inspections, potentially delaying the detection of voltage drops, particularly during shift transitions. This study aimed to design, implement, and evaluate a real-time early warning system (EWS) for mobile tower batteries using an ESP32 microcontroller, applying the eight-step Quality Control Circle (QCC) methodology and the Plan–Do–Check–Act (PDCA) cycle. Operational records, field observations, team discussions, and cause-and-effect (fishbone) analysis were employed to identify the absence of automated battery monitoring and alert mechanisms as a primary operational issue. The developed system continuously monitored battery voltage and generated automatic notifications when voltage readings fell below 12 V in 12 V operating mode or 24 V in 24 V operating mode. Following implementation, monthly local area network (LAN) availability increased from 92.87% in January 2026 to 99.51% in April and remained at 99.49% in May 2026. Furthermore, no battery-related mobile tower downtime was recorded during the first week of April, compared with documented incidents during the corresponding period in January. These before-and-after findings indicated improvements in operational performance, although the observational design did not establish that the EWS alone caused the increase in network availability. The implementation demonstrated the potential of automated battery monitoring to facilitate earlier fault detection, accelerate maintenance responses, and support network reliability and preventive maintenance practices. Further research involving longer monitoring periods and additional battery health indicators was recommended to evaluate the system's sustained effectiveness and operational reliability.

The Role of Certified Workers in Increasing the Success of Building Construction Projects Through Risk Management and Knowledge Management

Ni Putu Anggita Putri Bali Sinarta — 2026-11-03

Building construction projects in Badung Regency, Indonesia, frequently encounter delays and operational disruptions that require competent personnel and systematic project management practices. This study examined the mediating roles of risk management and knowledge management in the relationship between certified construction workers and project success. A quantitative research design was employed, using questionnaire data collected from 50 managerial and technical construction personnel selected through purposive sampling across medium- and large-scale building construction projects. Of these, 47 valid responses were included in the final analysis using partial least squares structural equation modeling (PLS-SEM) with SmartPLS 4. A preliminary pilot study involving 20 respondents was conducted to assess the research instrument. The initial structural model, excluding mediating variables, demonstrated a positive and statistically significant relationship between certified workers and project success (? = 0.405; t = 3.400). However, after incorporating the mediating variables, the direct relationship became statistically nonsignificant (? = ?0.038; p = 0.335). Certified workers demonstrated positive associations with risk management (? = 0.399) and knowledge management (? = 0.465), while risk management (? = 0.605) and knowledge management (? = 0.302) were positively associated with project success. The indirect relationship through risk management was statistically significant (? = 0.241; p = 0.003). Meanwhile, the indirect relationship through knowledge management (? = 0.140; t = 1.739; p = 0.041) required clarification regarding the application and justification of a one-tailed significance test, as the reported t-statistic would not meet the conventional 5% significance threshold for a two-tailed test. Overall, the findings suggested that workforce certification was associated with improved construction project outcomes primarily through the integration of professional competencies into structured risk management and organizational knowledge-sharing practices.

Relocation of the Fuel Fast Fill Unit on the Komatsu PC2000 from Beneath the Engine to the Unit Stairs as an Effort to Improve Safety, Refueling Efficiency, and Reduce Production Loss Time (Case Study of Quality Control Project Implementation in the AMM Pit Area, Mifa Jobsite, PT Putra Perkasa Abadi, 2025)

Johan Chrisna B — 2026-11-09

The Komatsu PC2000 excavator operating in the AMM Pit Area at the Mifa Jobsite was equipped with a fast-fill fuel system positioned beneath the engine, exposing its components to potential damage from boulder impacts and creating accessibility challenges during refueling operations. Maintenance records from February 2024 to July 2025 documented nine system-related incidents resulting in at least 25 hours of equipment downtime, of which 16.7 hours (66.8%) were attributed to structural damage. This study evaluated the relocation of the fast-fill fuel connection point from beneath the engine to the excavator stairway area using the eight-step Quality Control Circle (QCC) methodology integrated with the Plan–Do–Check–Act (PDCA) cycle. Data were collected through maintenance records, field observations, cross-functional team discussions, Pareto analysis, Ishikawa cause-and-effect analysis, and solution-selection matrices to identify the primary causes of equipment downtime and determine appropriate corrective measures. Following the relocation, no additional fast-fill system disturbances were recorded during the specified monitoring period. For seven Komatsu PC2000 excavators, the projected operational benefits included annual savings of 638.5 equipment operating hours, a reduction in fuel consumption of approximately 76,620 liters, and a potential productivity gain of 447,125 bank cubic meters (BCM). However, these estimates were based on projected operational scenarios rather than independently verified annual performance measurements. The reported implementation cost was IDR 34,815,899 per excavator. Overall, the modification improved access to the refueling connection and potentially reduced component exposure to mechanical impacts, although its long-term reliability, safety performance, and economic benefits required further evaluation. These findings demonstrated the potential of evidence-based maintenance practices and multidisciplinary QCC methodologies to support targeted equipment modifications, improve refueling efficiency, and minimize production-related downtime in mining operations.