Strategy to Improve the Accuracy of Dewatering Pit Pumping Forecasts by Designing an IoT-Based Realtime Pump Discharge Monitoring System (SIMPATIK) in the Mining Environment of PT Antareja Mahada Makmur (AMM) Jobsite Mifa Bersaudara (2026)

Felix Suranta Sihotang — 2026-10-21

Accurate dewatering forecasts are essential for maintaining production schedules and safe working conditions in open-pit coal mines. At the Mifa Bersaudara jobsite of PT Antareja Mahada Makmur (AMM), weekly manual pump discharge measurements limited the detection of pumping fluctuations, resulting in a dewatering forecast accuracy of approximately 50%. This study aimed to improve dewatering forecast accuracy through SIMPATIK, an Internet of Things (IoT)-based real-time pump discharge monitoring system. An operational improvement approach based on the Plan–Do–Check–Act (PDCA) cycle was implemented from August 2025 to March 2026. The system integrated clamp-on ultrasonic flow sensors, a microcontroller, a data logger, and an online monitoring dashboard to record pump discharge at three-second intervals. Hydraulic calculations were used to determine the optimal pump discharge range, while system performance was evaluated by comparing forecast and actual water-level reductions before and after implementation. The results showed that dewatering forecast accuracy increased from approximately 50% to more than 95%, while equipment assembly costs decreased from IDR 138,236,000 to IDR 16,280,000, representing a cost reduction of approximately 88%. Improved discharge monitoring supported the scheduled exposure of 206,733 metric tons of Seam C coal and was associated with an increase in overburden production from 689,400 to 879,400 bank cubic meters (BCM). Remote monitoring also reduced the need for manual discharge measurements near water bodies. These findings indicate that integrating continuous pump discharge monitoring into mine dewatering planning can improve forecast reliability, support production coordination, reduce monitoring costs, and minimize personnel exposure to operational hazards.

Internalising Bankruptcy Externalities: A Judicial Framework for Proportional Insolvency Intervention in Indonesia

Royana Lumban Gaol — 2026-10-21

Bankruptcy remedies can impose costs on employees, consumers, suppliers, and other stakeholders beyond the immediate debtor–creditor relationship. In Indonesia, scholarly debate has largely focused on bankruptcy eligibility, leaving the consequences of remedy design comparatively underexamined. This study aimed to develop a judicial framework for identifying and mitigating external costs attributable to insolvency remedies while preserving creditor protection. Prescriptive normative legal research was conducted using statutory, conceptual, case-based, and functional comparative approaches. The analysis examined the Telkomsel, Batavia Air, and Sritex cases, with Garuda Indonesia’s restructuring serving as a comparator, drawing on legislation, judicial decisions, issuer disclosures, institutional reports, and published sources. The findings indicated that remedy-attributable externalities varied according to the debtor’s financial condition and the manner in which the remedy was implemented. The Telkomsel case illustrated the potential costs of imposing bankruptcy on a solvent company; Batavia Air highlighted the disruption associated with an abrupt cessation of operations; and Sritex demonstrated the importance of distinguishing externalities arising from underlying business failure from potentially avoidable costs attributable to the implementation of insolvency remedies. Garuda Indonesia’s restructuring illustrated how restructuring mechanisms can preserve operational continuity. The study proposed the Bankruptcy Externality Internalisation Test, comprising stakeholder identification, counterfactual attribution, remedy design, and a reasoned externality statement. This framework provides a basis for transparent and proportionate judicial intervention in insolvency proceedings without altering bankruptcy eligibility requirements or granting affected stakeholders veto rights. However, whether the proposed framework can effectively reduce remedy-attributable external costs while preserving creditor recovery remains subject to empirical validation.

Journal of World Science

Strategy to Improve the Accuracy of Dewatering Pit Pumping Forecasts by Designing an IoT-Based Realtime Pump Discharge Monitoring System (SIMPATIK) in the Mining Environment of PT Antareja Mahada Makmur (AMM) Jobsite Mifa Bersaudara (2026)

Internalising Bankruptcy Externalities: A Judicial Framework for Proportional Insolvency Intervention in Indonesia