https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/issue/feed 2025-07-29T14:40:30+00:00 Herlina herlina@untag-sby.ac.id Open Journal Systems <p>Heuristic: Jurnal Heuristic (Heuristic Journal) is a peer-reviewed journal, published by Industrial Engineering Department, Faculty of Engineering Universitas 17 Agustus 1945 Surabaya. Heuristic Journal was first published in 2003. At first, this journal was published twice a year. Starting in 2014 this journal is only published semiannually, in April and October. This journal gives readers access to download journal entries in pdf file format. Heuristic Journal is created as a means of holistic and dissemination for researchers to publish research articles. The Heuristic Journal only accepts articles related to the topic of industrial engineering study. The Heuristic Journal is available in both print and online. The language used in this journal is Indonesian.</p> https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/132386 2025-07-29T14:38:03+00:00 HEURISTIC HEURISTIC heuristic@untag-sby.ac.id 2025-04-30T00:00:00+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/12639 2025-05-13T05:32:23+00:00 Abdan Syaker asyaker02@gmail.com Isna Nugraha 21032010051@student.upnjatim.ac.id

PT XYZ is a wheat flour producer that faces high challenges in the effectiveness of the wheat transfer machine in the Jetty Operation Section. This study aims to analyze machine performance using the Overall Equipment Effectiveness (OEE) and Root Cause Analysis (RCA) methods. The results showed the OEE values of Hartman I, Hartman II, and Neuro machines were 93% each, which is classified as normal according to the Japan Institute of Plant Maintenance, but can still be improved. Measurement of the six big losses identified Reduced Speed Losses as the main factor, 1.93% for Hartman I and Hartman II respectively, and Idle and Minor Stoppages Losses at 1.37%. The final stage using RCA provides improvement suggestions based on human, method, material, machine, and environmental factors. These recommendations are expected to increase machine effectiveness and support smooth production in the Jetty Operation Section.

2025-05-13T03:54:33+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/12761 2025-05-13T05:29:35+00:00 Ar'Rafi Dhani Pratama 20106054@ittelkom-pwt.ac.id Halim Qista Karima halim@ittelkom-pwt.ac.id Fauzan Romadlon fauzanro@telkomuniversity.ac.id Rosita Dewi Permatasari 21106059@ittelkom-pwt.ac.id

According to data from the Indonesian Statistics Agency, the number of PDAM users in Banyumas Regency in 2023 was 52.5%. Good PDAM service can be seen from customer satisfaction with the performance of PDAM Tirta Satria Banyumas Regency. Many customers have complained about PDAM Tirta Satria, which means that the customer is less satisfied with the provided services. It is necessary to improve performance. However, to increase customer satisfaction, the services provided by PDAM Tirta Satria still need to be addressed, such as services that are not fast and precise, as well as various other indicators. This can be seen from the number of gaps calculated using the Servqual method, and the Cartesian diagram shows the main priority to be improved. According to the data agency, this study aims to measure customer satisfaction with the services and performance that PDAM Tirta Satria Banyumas has carried out. The method used is quantitative, with 204 respondents being various PDAM Tirta Satria Banyumas Regency customers. The data were analyzed using reliability and validity tests to prove that the data used were valid and reliable. The results showed that five dimensions need improvement: responsiveness, empathy, assurance, communication, and physical evidence. There needs to be an improvement in the quality of customer service through staff training and providing communication channels to improve the customer complaint handling system to be more responsive and timely.

2025-05-13T03:57:20+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/12985 2025-05-13T05:39:39+00:00 Ulul Azmi azmi.ulul2121@gmail.com Farida Pulansari 21032010047@student.upnjatim.ac.id

Customer satisfaction plays an important role in today's competitive business era, where a deep understanding of customer satisfaction provides valuable information for business development. A deep understanding of how satisfied customers are with the services provided is a strategic aspect that allows companies to adapt and grow. In this study, PT. X was chosen as the subject of the case study because of its strong reputation in the travel industry. This study aims to evaluate the level of customer satisfaction at PT. X using one of the methods to measure customer satisfaction, namely the Net Promoter Score (NPS) method. The Net Promoter Score method is a relevant tool in measuring variables related to customer satisfaction. The results of data analysis from five questions in the questionnaire showed an average NPS score of 58.3 which reflects a high level of customer satisfaction. Therefore, PT. X can continue to focus on services to improve customer satisfaction sustainably. The increase in customers who are included in the passive and detractor categories is also a potential focus for further development. The conclusion of this study is expected to provide valuable knowledge for companies in their efforts to improve customer satisfaction through an effective and measurable approach.

2025-05-13T03:59:32+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/12991 2025-05-13T05:43:16+00:00 Michael Aria Irawan michaelaria23@gmail.com Farida Pulansari michaelaria23@gmail.com

The tighter the competition between companies in gaining market access, the more companies compete to implement market transformation strategies. A business generally has the same main goal, which is to achieve optimal profits based on business growth in the long run. But besides that, the company must be able to maintain the quality of the products it produces or improve the quality of the products it produces, both in the form of services and goods. In this research PT XYZ is a company engaged in packaging manufacturing, including food and paint. The main purpose of this study is to find the Risk Priority Number (RPN) and Criticality Point using the FMECA method. FMECA aims to analyze the potential risks that can arise in tools, processes and systems. The results of the analysis of the RPN results and criticality points that there are 5 priority failure modes, namely the accumulation of too many production goods, the assemble control tool does not work, the raw materials hit each other, the raw materials suffer physical damage, and the machine often jams due to a lot of dust. The conclusion of this study is that the company can make improvements to its production process in an effort to improve the quality of its canned products through the details of improvements that have been determined.

2025-05-13T04:01:49+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/131830 2025-05-13T05:51:13+00:00 I Made Ronyastra ronyastra@staff.ubaya.ac.id

Lobster (Panulirus spp.) aquaculture holds significant economic potential for coastal Indonesia, including Situbondo, East Java, relying heavily on wild puerulus harvest. However, developing sustainable cultivation and trading ventures faces considerable financial uncertainties due to biological, market, operational, and policy risks. This study assesses the economic feasibility and identifies key financial risks for lobster cultivation and puerulus trading in Situbondo. An integrated framework combining financial analysis with Monte Carlo Simulation for risk assessment was used, utilizing primary data and secondary sources. Probabilistic analysis identified key risk factors impacting profitability through sensitivity analysis. The financial modelling and analysis resulted positive valuation for both trading (48 billion rupiah NPV, B/C ratio 1.12) and cultivation (0.99 billion rupiah NPV, B/C ratio 1.52). The risk analysis identified 4 main risk factors: selling price, survival rate, exchange rate, and interest rate. Ultimately, this risk-integrated feasibility assessment provides crucial insights for investors, farmers, and policymakers, supporting informed decisions for sustainable lobster aquaculture development in Situbondo.

2025-05-13T04:04:32+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/13121 2025-05-13T05:56:25+00:00 Naufal Ardi Hamzah dini_retnowati@dosen.umaha.ac.id Dini Retnowati dini_retnowati@dosen.umaha.ac.id Dony Perdana dini_retnowati@dosen.umaha.ac.id

This study aims to analyze quality control in the production process of TRC 1 yarn at PT. SA by implementing the Six Sigma approach. The TRC 1 product exhibits a defect (reject) rate of 4.1%, which significantly exceeds the company's standard of 1%. The research adopts the DMAIC method (Define–Measure–Analyze–Improve–Control). The measurement phase involves the creation of histograms, both attribute and variable control charts, and the calculation of DPMO and Cp. The results indicate that the process is statistically unstable, with a sigma level 2.2 and a DPMO of 245,000. The process capability index (Cpk) of 0.503 demonstrates that the process is incapable. Root Cause Analysis (RCA) and Failure Mode and Effect Analysis (FMEA) identified the primary causes as the absence of measuring instruments for raw material composition and the lack of a standard operating procedure (SOP) for machine inspections. The improvement phase was carried out using the 5W1H approach, resulting in solutions such as developing measurement tools, nozzle labeling, and issuing operational memos. After four months of implementation, the defect rate decreased to 3.24%. Although improvements were observed, the result still exceeds the company's target, indicating the need for continuous process control. This study contributes to applying Six Sigma for quality improvement in the integrated textile industry.

2025-05-13T04:07:40+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/131909 2025-07-14T04:42:45+00:00 Henri Ponda henri_ponda@umt.ac.id Nur Fadilah Fatma henri_ponda@umt.ac.id Jordi Haidar Azis henri_ponda@umt.ac.id

In the aviation maintenance, repair, and overhaul (MRO) sector, facility adequacy is crucial to meet increasing service demands. PT ABC, a leading MRO company, faced a bottleneck due to a lack of tail dock infrastructure, impacting its ability to fulfill aircraft maintenance orders. This study evaluates the investment feasibility of constructing or purchasing a movable tail dock for Line B operations. The financial analysis was conducted using Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period (PP) methods. Results show that manufacturing the movable tail dock internally yields a Net Present Value (NPV) of IDR 673,580,000, an Internal Rate of Return (IRR) of 18.25%, and a Payback Period (PP) of 9.7 years. These results indicate that the investment is financially feasible, as NPV is positive, IRR exceeds the company's Minimum Attractive Rate of Return (MARR), and the Payback Period is within acceptable limits. Thus, building the movable tail dock internally is the preferred investment option.

2025-07-10T01:47:18+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/12114 2025-07-14T05:04:59+00:00 Amanda Ela Wijaya amandaelawjya@unissula.ac.id Nur Widiana nurwidiana@std.unissula.ac.id Wiwiek Fatmawati wiwiek@std.unissula.ac.id

CV. XYZ is a company engaged in agribusiness as a fertilizer producer. CV manufacturing process. XYZ has not fully paid attention to the environment with the discovery of pollution due to waste. Based on observations, the percentage of B3 and non-B3 waste that has been managed is 36% and that which has not been managed is 64%. In addition to environmental pollution, this problem will also affect the economy and society if there is environmental damage and workers' health problems. This research was conducted to identify factors that support companies to implement environmentally friendly practices and provide recommendations so that companies know the steps in implementing these practices. The method used is fuzzy to tolerate inappropriate data from the questionnaire and TOPSIS to rank supporting factors based on economic, social, and environmental perspectives. The results showed that the priority supporting factors in the economic sector were market trends (0.629), social sectors were worker demand (0.594), and environmental sectors were regulatory compliance (0.629). Based on these factors, the recommendation given based on an economic perspective is to implement the 3R, namely reduce, reuse, and recycle. Recommendations based on a social perspective are the existence of ISO 14001 training programs and AMDAL training. Recommendations based on an environmental perspective are the establishment of waste limits for each department, a zero waste culture, the provision of a storage place for all waste, and working with third parties to manage all waste.

2025-07-10T00:00:00+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/131963 2025-07-14T05:09:58+00:00 Erni Puspanantasari Putri erniputri@untag-sby.ac.id Almaceley S Plando erniputri@untag-sby.ac.id

In order to gather information on business decisions and to evaluate the economy and efficiency of current operations, companies require performance evaluation. In the absence of standards or benchmarks for assessment, performance evaluation plays a crucial role in enhancing the business's operational procedures. Data envelopment analysis (DEA) is a tool for measuring performance. The objectives of this study are to measure the efficiency of warehousing, expedition, and courier companies using the input-oriented DEA envelopment model; to analyze the DEA efficiency scores of each decision-making unit (DMU); to identify the efficient and inefficient status of each DMU; and to provide recommendations for development strategies to improve the efficiency of these companies. The results of the study indicate that the inefficient DMU has a presentation of 60%. This value is 20% greater than the efficient DMU (40%). Based on the fluctuation of DEA efficiency score distribution in each DMU, there are 6 DMU efficiency groups. These are Group 1 (ES = 1, Very Efficient), Group 2 (ES = 0.90 - 0.99, Highly Efficient), Group 3 (ES = 0.80 - 0.89, Quite Efficient), Group 4 (ES = 0.60 - 0.79, Less Efficient), Group 5 (ES = 0.41 - 0.59, Inefficient), and Group 6 (ES = 0 - 0.40, Very Inefficient). Group 1 ranks first with the largest percentage (40%). The second and third ranks are Group 3 (30%) and Group 4 (20%). The fourth rank is Group 2 (1%). This study does not have DMU with 2 efficient categories, namely: Group 5 and Group 6.

2025-07-10T02:15:10+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/132163 2025-07-14T05:21:19+00:00 Hery Murnawan herymurnawan@untag-sby.ac.id Wiwin Widiasih herymurnawan@untag-sby.ac.id Yulia Rahmawati herymurnawan@untag-sby.ac.id Nabila Melandari herymurnawan@untag-sby.ac.id

The demand for goat meat continues to increase annually, both for daily consumption and religious events such as Aqiqah and Qurban. However, production has not kept up with demand due to the limitations of goat growth and fattening processes, mainly caused by dependence on green feed which relies on land availability and weather conditions. This supply-demand imbalance often results in the slaughter of young goats. Factors contributing to this gap include the continued reliance on forage and concentrate-based feeds, which are not only costly but also slow in promoting meat growth and reproductive cycles. Feed innovation is introduced to support sustainable goat farming systems. The innovation involves providing dry feed without forage, using a fermentation process of liquid nutrients mixed with ground corn cobs and added concentrate. Dry feed helps reduce operational costs by eliminating the need for forage collection. It also simplifies the fattening and care process, increases meat productivity, and ultimately enhances farmers’ social welfare through greater profits. The study applied dry feed to 30 goats using a dynamic simulation model to evaluate growth and income, contributing to food security. Dry feed increased monthly weight gain to 3 kg from the previous 2 kg using green feed and concentrate. It yielded a net profit of IDR 104,600 per goat/month, compared to IDR 55,000. When applied to 30 goats, farmer profits increased from IDR 1,650,000 to IDR 3,138,000/month. The results show that dry feed significantly increases farmer income, encouraging more goat farming activities and strengthening food security in the goat meat sector.

2025-07-10T02:26:53+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/132379 2025-07-29T14:32:10+00:00 Muslimin Abdulrahim muslimin2@untag-sby.ac.id Herlina Herlina herlina@untag-sby.ac.id

PT DMR is a job order that produces ± 285 product items. This study focuses on 3 items, namely Wheels (wheels 30, 40, and 50), Hinge T 86, and Handle 28. Currently, the company has not been able to determine the capacity of each production line and has not been able to determine the Delivery Time accurately. The company wants to know and increase its production capacity so that it can be determined when the Delivery Time is on time. The analysis method used is the arrangement of the production line with line balance. After the calculation and analysis, it was obtained that the efficiency of the Wheel 40 product line increased from 52.43% to 78.19%, Balance Delay decreased from 47.57% to 21.87%, while the Cycle Time of production operations decreased from 15.84 "to 9.00", this occurred due to the use of expanded mattress holes from 10 holes to 14 holes. Wheel 50 experienced an increase in track efficiency from 48.83% to 95.31%, with a decrease in Balance Delay from 51.17 to 4.69, while for the Cycle Time of operations decreased from 19.52 "to 10.00", this occurred due to the use of expanded mattress holes from 8 holes to 12 mattress holes. Hinge T 86 increased from 46.40% to 50.3%, with balance delay decreased from 53.60% to 49.7%, while the operating Cycle Time decreased from 28.8” to 26.58”, an increase due to the addition of outsourcing capacity from 6000 pieces / 2 days to 7000 pieces / 2 days, namely by adding other sources, or still with the condition of additional outsourcing capacity. Handle 28 was not changed because the calculation results showed a production line efficiency of 93.3% (quite high) and Balance Delay 6.7%.

2025-07-29T05:01:32+00:00 ##submission.copyrightStatement## https://jurnal.untag-sby.ac.id/index.php/HEURISTIC/article/view/132387 2025-07-29T14:40:30+00:00 HEURISTIC HEURISTIC heuristic@untag-sby.ac.id 2025-04-30T00:00:00+00:00 ##submission.copyrightStatement##