Jurnal Sistem dan Manajemen Industri
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Layout improvement design to reduce material handling cost by using the systematic layout planning method in the MSME industry
Get PDFThis research discusses layout improvements in MSMEs that produce skin crackers distributed in the Jabotabek area. Currently, the quantity of skin crackers produced is experiencing problems. One of the causes of problems is that material handling is still manual, poor layout settings, limited costs, unpredictable weather and lack of labor availability. Poor material handling causes long production duration, workers are less safe and comfortable, and material handling costs are high. Therefore, this research improved the layout by improving the material handling process. The research aims to analyze the existing layout problems, improve the layout, and compare the existing layout with the proposed layout. The method used to improve the layout is systematic layout planning (SLP). The results of the study are that material handling costs reduced by IDR 256,754.99 or 67.8%, increasing capacity by 17.77 kg per week can solve stock shortages, and the duration of material handling is reduced by 28.95 minutes per day or 69.19%
Ambidextrous IoT governance to support EnergyCo’s digital transformation based on COBIT 2019 traditional and DevOps
Get PDFThe accelerating digital transformation in the energy sector demands robust governance mechanisms for emerging technologies, particularly the Internet of Things (IoT). This study examines the governance challenges faced by an energy company in Indonesia as it strives to manage IoT ecosystems while meeting regulatory requirements and achieving organizational objectives. Despite IoT’s critical role in enabling digital transformation, limited Research has explored IoT governance frameworks grounded in COBIT 2019, especially within the energy domain. To bridge this gap, this study develops an ambidextrous IoT governance framework by integrating the Traditional and DevOps Focus Area mechanisms from COBIT 2019. The framework is designed to balance stability and adaptability in managing IoT-related risks. A Design Science Research methodology is employed, complemented by a case study approach involving interviews, questionnaires, and internal document analysis to ensure contextual relevance and data saturation. The study identifies and evaluates governance priorities by aligning Governance and Management Objectives (GMOs) with national regulations, design factors, and prior research findings. Based on gap analysis using seven components of the selected GMO, DSS (Managed Security Services), the study proposes targeted improvements to IoT governance. These include strengthening leadership accountability, advancing cybersecurity competencies, and enhancing system monitoring capabilities. The implementation of these improvements is projected to elevate the DSS maturity level from 3.29 to 3.86, supporting its digital transformation agenda in alignment with COBIT 2019. This Research contributes to the literature by offering a structured, context-aware IoT governance framework and providing actionable insights for practitioners seeking to govern IoT initiatives within complex, regulated environments
Early fault detection system for sugar mill machines through various machine learning approach
Get PDFThe milling machine is a crucial aspect of the sugarcane agroindustry production system; a disturbed milling machine will cause a decrease in production efficiency, sap quality degradation, and excessive energy consumption. An early fault anomaly detection system through machine learning is a solution to overcome the problems in sugarcane milling machines. The purpose of this research is to propose a system architecture design for early fault anomaly detection in sugarcane agroindustry milling machines and to evaluate the performance of various machine learning models on historical sensor data, identifying the most promising approach. This study proposes a novel anomaly detection framework for sugarcane milling machines to advance smart monitoring in agro-industrial systems. Using an empirical dataset of 7,673 sensor instances (temperature, vibration, pressure, and humidity), and applying several machine learning algorithms (logistic regression, decision tree, and random forest), the framework integrates multi-sensor data to improve fault prediction and reduce downtime. The results showed that the random forest had the best accuracy, at 98.13%, followed by the decision tree, at 97.87%, and logistic regression, at 89.70%. Feature contribution analysis reveals that the vibration signal is the most dominant contributing factor among other features. The results show that machine learning is a potential approach for predicting faults in sugarcane milling machines, which can help the sugarcane agriculture industry make informed decisions in the event of disturbances in these machines
Comparative analysis of optimization methods for cut order planning in apparel manufacturing
Get PDFThis study seeks to address the complicated optimization challenge inherent in cut order planning (COP) in the clothing manufacturing business, emphasising fabric consumption, computational economy, and production accuracy. Three optimization approaches were compared: adaptive heuristic scoring optimizer (AHOPS), hybrid metaheuristic optimization with simulated annealing (HIMOSA), and gradient-based penalty-driven (GBPD). The results show that the GBPD method achieved the highest fabric utilization (87.13%), the fewest amount of fabric layers (12), and the maximum computational efficiency (0.022 seconds), significantly outperforming both conventional methods and alternative advanced approaches. AHOPS and HIMOSA, on the other hand, required more layers (15) and produced lower fabric utilization (around 69.70%), with HIMOSA demonstrating noticeably greater computational needs (0.527 seconds). The adaptive heuristic scoring mechanism and the combination of gradient descent and machine learning predictions, which successfully handled the combinatorial difficulties of COP, are responsible for GBPD\u27s exceptional performance. These results offer useful information to manufacturers looking for scalable, effective optimization solutions. They also point to potential avenues for future research, such as extending the applicability of GBPD to more intricate production scenarios and further honing machine learning models for increased efficiency and adaptability
Analyzing operational risks of a recyclable waste-based payment public transit system in Surabaya, Indonesia
Get PDFSuroboyo Bus, a municipal public transportation initiative managed by the Surabaya Department of Transportation (SubDOT) in Indonesia, was launched to promote the use of public transit by accepting recyclable plastic waste as transit fare payments. However, this transportation system presented challenges, as prior to 2019, Suroboyo Bus performed its operational activities without adequately incorporating operational risk, specifically considering Health, Safety, and Environment (HSE) factors. The analysis of risk profiles and a mitigation plan concerning the well-being of both their staff and passengers was uncomprehensive. To address these issues, this paper evaluates the operational risk based on ISO 31000:2018, the Failure Mode and Effect Analysis (FMEA), and the Benefit Cost-Analysis (BCA). The analysis identified 114 risks and 189 combinations of risks and impacts across 70 business processes associated with Suroboyo Bus operations, with varying degrees of risk severity. Risk prioritization analysis was performed using the Pareto 80:20 principle. Proposed risk response strategies include avoidance, mitigation, transfer, and tolerance. Evaluation of the feasibility of these strategies through benefits and cost analysis, supplemented by a sensitivity analysis, revealed Benefit-Cost Ratio (BCR) values ranging from 1.041 to 1.471, indicating that the proposed mitigation plan is feasible for all evaluated scenarios. These findings underscore the importance of implementing risk mitigation measures to improve the sustainability and effectiveness of the Suroboyo Bus service. Future research should explore the digital application developed for Suroboyo Bus passengers as part of the business process named “Golek Bis” (GOBIS) and other methods that can be used to enhance the quality and comprehensiveness of risk management
A hybrid fuzzy SWARA-COPRAS framework to evaluate sustainable co-firing in coal power plants: A case study from Indonesia
Get PDFThe transition to sustainable energy encourages various countries, including Indonesia, to adopt Co-Firing technology to reduce carbon emissions without requiring significant investments in power plant infrastructure. The selection of appropriate biomass materials, based on sustainability dimensions, significantly influences the success of Co-Firing implementation. This study proposes a hybrid framework that integrates the Fuzzy SWARA and Fuzzy COPRAS methods to holistically evaluate Co-Firing alternatives, considering technical, economic, environmental, social, and supply chain aspects. A case study was conducted at a power plant in Indonesia, involving four experts from the industry and academia to assess 23 sustainability sub-criteria and five biomass alternatives. The results indicate that the sub-criteria of water footprint, supplier reliability, local job creation, and co-firing retrofit cost are dominant factors in biomass selection. This research selected Alternative 2 (wood chips) as the most effective biomass material for implementation at power plants in Indonesia. Additionally, sensitivity analysis confirmed that biomass is the most stable alternative to changes in criteria weights, which offers high flexibility in the supply chain and circular economic potential. These findings contribute theoretically to developing multi-criteria decision-making methods based on fuzzy logic and practically support policymakers and industry in planning sustainable and adaptive Co-Firing strategies in the face of uncertainty
Responding to the potential environmental impact to extend battery life: Preliminary study of informal actors\u27 readiness
Get PDFThe increasing number of electric motorcycles in Indonesia has created new challenges related to battery waste management, potentially impacting human health, the environment, and resource scarcity. This study aims to assess the potential life cycle impacts of a 1.0 kWh electric motorcycle battery product system under repair treatment for two widely used battery types: NMC and LFP. The study used a Life Cycle Assessment (LCA) method with gate-to-gate assessment. The assessment results for both battery types with repair treatment had the greatest impact on the midpoint of freshwater eutrophication. Based on the normalized results of the five impact categories assessed, the repair treatment on LFP type batteries showed better environmental performance than the NMC type. The balancing process was found to have the greatest environmental impact for both battery types. This study confirms that recycling management by informal actors is a significant solution. The repair treatment solution contributes to providing benefits in extending the battery life cycle and does not have the potential for significant environmental impacts
Innovative canting: A triz approach to improve traditional batik production process in small and medium enterprise
Get PDFThis research aims to improve the efficiency of the canting tool used in the Batik-making process in Giriloyo Village. One of the main issues identified is the suboptimal size of the canting spout, which causes wax blockages due to dirt particles. This study employs TRIZ tools, including Function Analysis, to identify problems, develop innovative solutions to the issues, and develop solutions that address contradictions in the canting system. The analysis results indicate that several inventive principles, such as Merging, Beforehand Cushioning, Segmentation, and Feedback, can enhance the canting tool\u27s performance. Proposed solutions include adding a heater, filter, flow regulator, and interchangeable canting spouts to meet different needs. These solutions can accelerate the Batik-making process, reduce production costs, and enhance market competitiveness. However, further verification is required to validate the proposed design\u27s superiority over traditional canting tools. This research opens opportunities for further development in Batik tool innovations to enhance the sustainability of the Batik creative industry in Indonesia
Discrete-event simulation of truck–excavator systems in surface mining using a finite-source closed-loop queuing model
Get PDFTruck-excavator interaction in surface mining is often modeled as finite-source, closed-loop queuing systems. An optimization-based approach is typically used, assuming deterministic and homogeneous fleet configurations. This paper aims to contribute to the current literature by implementing a simulation-based approach, discrete-event simulation (DES), to analyze a finite-source closed-loop queuing model in a surface mining operation. The case study used was coal overburden removal activities, which operate under a first-come, first-served discipline, and loop through four phases: loading, hauling, dumping, and returning. Under the current fleet configuration, the overburden removal activity is experiencing a 19,17% production shortfall and a match factor (MF) of 0.74. An MF below 1 indicates an under-truck system, where the excavator often idles while waiting for the trucks to arrive. Three scenarios were tested using the validated DES model: (1) the as-is scenario with four trucks and one excavator, (2) variations of truck quantity, and (3) a route improvement scenario to reduce travel time. Simulation results indicate that adding five trucks yields the highest productivity (533.86 BCM/hour), utilization (92.48%), and MF (0.91), while the route improvement scenario achieved nearly comparable performance (513.94 BCM/hour, 88.86% utilization, MF = 0.88) with lower resource. Although the current case study operates under a homogeneous fleet with a single excavator, this study also tests the DES model under heterogeneous fleet configurations and a multi-server setup involving two excavators. These findings highlight the DES capability in modeling and analyzing a queuing system under a finite-source closed-loop, both for homogeneous and heterogeneous fleet configurations
A comparison allocation of labor qualification on real, plan, and regulation calculation using resource-leveling method
Get PDFLabor is a crucial resource in industrial construction projects. A common issue is the uneven number of laborers who are overallocated. This study uses the resource-leveling method to compare and determine the optimal number of labor and project duration based on plan, real, and regulation conditions. In this study, the data required in real conditions is obtained from daily report data. In planned conditions, data is obtained from the scheduled manpower made by the contractor, while in conditions based on regulations, the calculation of the number of laborers uses the coefficient values listed in the Regulation of the Minister of Public Works and Public Housing No. 1 of 2022. This research is measured through disparity values, which show an imbalance in the allocation of labor caused by the uneven allocation of labor based on its workload. The results showed a significant difference in the number and distribution of labor. Regulation conditions resulted in higher labor numbers due to detailed calculations on each type of work and labor qualifications. The highest disparity occurs in workers, with a value of 0.93 in the plan condition and -0.51 in the regulation condition. The resource leveling helped balance labor allocation but increased project duration from 98 to 112 working days. These findings provide practical insights for project managers to optimize worker planning and distribution, improve efficiency, and reduce overallocated risks