Jurnal Online Teknologi Industri (UMI FTI - Fakultas Teknologi Industri, Universitas Muslim Indonesia Makassar)
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MITIGATING CONSTRUCTION DELAYS USING MONTE CARLO SIMULATION: A RISK BASED APPROACH
Full text linkThis study analyzes the schedule delays in the foundation work of an ammonia tank construction project at a fertilizer company in Sumatra. The research identifies key risks affecting the project's schedule and assesses their impact using Monte Carlo simulation. A risk analysis framework is developed by integrating deterministic scheduling with uncertainty modeling to quantify the probability of project completion within the planned timeframe. The study applies a two-stage risk analysis approach, consisting of pre-mitigation and post-mitigation assessments. The pre-mitigation analysis shows a low probability (22%) of completing the project on time due to high-impact risks such as material delivery delays and equipment failures. Based on these findings, mitigation strategies were implemented, including optimized procurement scheduling, quality control measures, and enhanced equipment maintenance. The post-mitigation simulation results indicate a significant improvement, increasing the probability of on-time project completion to 43%. This research highlights the effectiveness of Monte Carlo simulation in identifying critical risks, optimizing mitigation measures, and improving project schedule reliability
THE ROLE OF ERGONOMICS IN WORKSTATION MANAGEMENT TO IMPROVE PRACTICAL PERFORMANCE OF SMK NEGERI 1 SINGOSARI STUDENTS: A SYSTEMATIC LITERATURE REVIEW
Full text linkThis study aims to systematically review literature related to the role of ergonomics in workstation management to improve practical performance among students at SMK Negeri 1 Singosari. The systematic literature review method was utilized, involving the identification, evaluation, and synthesis of scholarly articles published between 2014 and 2024. Searches were conducted in reputable databases including Google Scholar, Scopus, ScienceDirect, SpringerLink, IEEE Xplore, and PubMed, using relevant keywords such as ergonomics, workstation management, vocational education, and student performance. Rigorous inclusion and exclusion criteria guided the selection of articles to ensure relevance, quality, and credibility. Analysis was performed thematically, categorizing findings into physical, cognitive, and organizational ergonomic factors. The results indicated that effective ergonomic practices significantly enhanced student comfort, concentration, safety, and productivity during practical learning activities. Supporting factors identified included adequate funding, administrative support, and increased ergonomic awareness, whereas barriers encompassed financial limitations, inadequate facilities, and resistance to change. This study underscores the importance of adopting ergonomically optimized environments to foster practical skill mastery and increased student motivation. Recommendations are provided for SMK Negeri 1 Singosari to integrate ergonomics more systematically, including curriculum-based ergonomic training, establishing ergonomic oversight committees, and fostering strategic collaborations to enhance student outcomes comprehensivel
HUMAN RELIABILITY ANALYSIS OF PACKAGING PRODUCTION OPERATORS WITH HIERARCHICAL TASK ANALYSIS (HTA) AND FUZZY HEART METHODS
Full text linkMachine operator experienced has a significant number of production defects and frequent failures to meet production targets. These issues are largely attributed to the high level of operator involvement in the production process, increasing the likelihood of human error. To address this, a Human Reliability Analysis (HRA) was conducted to identify factors contributing to human error and the associated risks of production defects. The analysis employed the Hierarchical Task Analysis (HTA) method to break down each task. Subsequently, Human Error Probability (HEP) and the Human Error Assessment and Reduction Technique (HEART) were used to evaluate the likelihood of human error and overall human reliability. In the HEART method, the Assessed Proportion of Effect (APOE) value was determined through expert judgment. To mitigate the subjectivity in APOE determination, a modification using Fuzzy Linguistic Expression was applied.
Analysis of Tofu Liquid Waste and Rice Washing Water Combination in Microbial Fuel Cell (MFC) System Using Taguchi Experimental Design
Full text linkTofu production generates residue in the form of liquid sewage, which is frequently disposed of in sewers. This has the potential to pollute streams and emit a distinct stench that may disturb the neighboring population. Tofu liquid waste can be converted into electrical energy using a Microbial Fuel Cell (MFC) technology. MFC uses the metabolic activity of microorganisms to transform organic chemicals in the substrate into electrical energy. This study will use Taguchi experimental design to provide recommendations for the optimal composition of the substrate usage ratio, incubation period, and addition of bioactivators, as well as their effect on the electrical power produced in MFC system using a combination of tofu liquid waste and rice washing water as the substrate. According to the findings of the research, the parameter with the greatest influence is incubation period (74.81%), followed by addition of bioactivator (19.45%), and substrate ratio (5.46%). The optimal composition is recommended to be incubated for one day with a 5% bioactivator addition and an 80:20 substrate ratio of tofu liquid waste and rice washing water
PERFORMANCE MEASUREMENT OF GREEN SCM WITH SCOR APPROACH TO REDUCE POLLUTION IN MSMES
Full text linkMicro, Small, and Medium enterprises (MSMEs) play an essential role in the Indonesian economy, contributing 61.97% to GDP and absorbing 97% of the workforce. However, MSME production also impacts environmental pollution due to limited knowledge and technology. This study aims to identify performance measurement indicators and develop a measurement model combining Green Supply Chain Management (GSCM) and Supply Chain Operations Reference (SCOR). This model focuses on integrating environmental aspects in the supply chain to reduce negative impacts during the product life cycle. This research method combines GSCM and SCOR which include processes (plan, source, make, delivery, return, waste), to produce performance measurements. The study results can provide recommendations for the government and MSME actors, especially in Sorong, in managing the supply chain sustainably and minimizing environmental impacts
REDUCTION OF SETUP TIME IN THE DISASSEMBLY PROCESS WITH A SINGLE MINUTE EXCHANGE OF DIES (SMED) APPROACH AND FUZZY FAILURE MODE AND EFFECT ANALYSIS (FMEA)
Full text linkPT XYZ, a company specializing in heavy equipment component remanufacture, is committed to ensuring that its processes run quickly and efficiently. However, from 2022 to 2023, the disassembly engine process exceeded the average processing time. Observations revealed that 24% of the time was categorized as waste setup time, necessitating a more objective reduction. This research aims to determine the actual total setup time, internal and external activities, and time reduction using the SMED and Fuzzy FMEA methods. The disassembly process includes the main disassembly, sub disassembly 1, and sub disassembly 2. Single Minute Exchange of Dies (SMED) is employed to identify and reduce setup time by distinguishing between internal and external activities. Additionally, this research integrates the SMED method with Fuzzy Failure Mode and Effect Analysis (FMEA) to identify potential risks in setup activities and determine which internal activities can be modified. Changes to external activities will be analyzed using the 5-Why's method to identify root causes and find solutions. Observations revealed that the average disassembly engine setup time was 20 hours and 12 minutes, consisting of 25 internal activities and 56 external activities. The SMED method resulted in an 18% reduction in setup time, and when combined with the Fuzzy FMEA method, the reduction reached 59%, equivalent to 8 hours and 17 minutes
OPTIMIZING VILLAGE ADMINISTRATION SERVICES USING THE SERVQUAL METHOD IN KLAMONO SORONG REGENCY
Full text linkVillage administration services are one of the critical public services in meeting the needs of society in Indonesia. However, these services often do not meet people's expectations and needs. Various factors, including low quality of service, complicated administrative processes, and lack of use of information technology in managerial procedures cause this. This research aims to optimize the village service system, focusing on improving the quality of services in rural communities. Service Administration often experiences obstacles in providing effective and efficient public services, mainly due to inadequate resources and infrastructure. This results in rural communities being less satisfied and often experiencing difficulties accessing the public services they need. The results of this research using the Servqual method using five dimensions of service and five instrument criteria influence the village administration services of Klamono District. Of the 14 instruments used, namely communication skills, skills and abilities, services provided and information system technology used by village officials in giving service. To optimize and streamline the benefits expected by the community, a website was created to facilitate the Klamono District village administration service system
ANALYSIS OF PRODUCT QUALITY BOGIE SET S2HD9C USING SIX SIGMA AND FMEA METHOD AT PT. BARATA INDONESIA (PERSERO)
Full text linkProduct quality is critical for businesses to survive and thrive in the marketplace. Likewise with PT. Barata Indonesia (Persero), which always wants to provide good product quality for customer satisfaction, PT. Barata Indonesia (Persero) is a State-Owned Enterprise (BUMN) in the manufacturing sector, which has a business line in the foundry or foundry sector, one of which is the production of train components. The company's difficulty is that there are still problems in producing the S2HDC bogie set, such as break mold, porosity, slag, and crack. This study aimed to analyze the quality of the Bogie Set S2HD9C product using the six sigma method and propose improvements using Failure Mode and Effect Analysis (FMEA). The research results found that the percentage of defects that occurred during August 2022 - January 2023 was porosity of 40.38%, break mold of 30.77%, crack of 17.31%, and slag of 11.54%. To obtain an average DPMO of 14191 with a sigma value of 3.69. The causes of these defects are caused by human, material, machine, method, and environmental factors. From the FMEA analysis, the defect's cause is the highest RPN value of 392, with the proposed improvement to closely monitor the cleaning process and recheck the core box in every process that will use the mold
SYSTEM MODELLING OF BEEF AVAILABILITY IN IKN BUFFER AREAS USING SYSTEM DYNAMICS
Full text linkThere are definitely several of pros and cons when relocating the country's capital from Jakarta to IKN. One of them has to do with the food security. As one of the IKN buffer areas, Balikpapan, has experienced issues with food security, particularly with regard to the supply of beef. The amount of imported beef in 2016-2019 shows a prediction that the amount of imported beef will continue to increase drastically yearly while the amount of local beef tends to decrease. The government of Balikpapan predicts that there will be an increase in the migrant population of up to 20.000 people each year due to the IKN, which can lead to an increase in demand for beef. Factors affecting the availability of beef in Balikpapan are local and imported beef availability, consumption, scarcity, and population demographics. This research was conducted using a system simulation approach with the system dynamic method to describe a complex system regarding the availability of beef in Balikpapan. Based on the scenario that has been developed, an effective policy that can be implemented to maintain the availability of beef in Balikpapan is to increase the cattle feed fraction by 15% and increase the arrival rate of imported beef by 10%. However, there is a need for an intervention policy from the government to increase local beef production, which is predicted to decrease, and minimize the amount of imported beef which dominates in fulfilling the beef consumption needs of the people of Balikpapan
Defect Analysis for HDPE Plastic Bag Products Using Seven Tools Method and Improvement Strategy with Kaizen Method at PT. HSKU
Full text linkPT. Harapan Sejahtera Karya Utama (HSKU) is a manufacturing company engaged in the production of plastic bags. This company produces various types of plastic bags made from HDPE. One of its superior products is HDPE plastic bags measuring 15x30, with total production from July to December 2022 of 3,072,923 units and a total of 435,670 units of defects. The purpose of this study is to determine the percentage of defects and their causes of defects and to propose quality improvements. This study uses the Seven Tools and Kaizen methods. The results of the study show that the percentage of defects in HDPE plastic bag products measuring 15x30 has the highest defects, namely Hole Defects at 64.76%; Folded Defects at 22.76%; Dirty Defects at 7.45%; and Detached Seal Defects at 5.03%. Proposed improvements are given with the Kaizen method, namely conducting supervision and controlling the five M factors and the five-step plan, namely providing training to improve operator capabilities and refreshments (SOP), applying strict penalties when making mistakes repeatedly, and making machine grouping data. According to the type and function, placing procedure manuals around the machine area, arranging air circulation equipment as needed, and providing storage areas for materials and plastic rolls in a safe and sterile place