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Jurnal Optimalisasi
Published by Universitas Teuku Umar
ISSN : 24775479     EISSN : 25020501     DOI : https://doi.org/10.35308/jopt
Core Subject : Engineering,
Control & Systems Engineering Industrial & Manufacturing Engineering
JURNAL OPTIMALISASI (JOPT) merupakan jurnal elektronik online yang diterbitkan oleh Program studi Teknik Industri, Fakultas Teknik, Universitas Teuku Umar. JOPT memuat kajian dibidang Manufaktur, Ergonomi dan Manajemen Rantai Pasok. Tujuan penerbitan jurnal optimalisasi adalah sebagai wadah publikasi yang mewadahi kebutuhan peningkatan kualitas karya ilmiah dalam rangka pengembangan keilmuan dan menyebarluaskan kajian bidang ilmu Teknik Industri, sekaligus sebagai wahana komunikasi diantara cendekiawan, praktisi, mahasiswa dan pemerhati masalah Industri. JOPT terbit dua kali dalam setahun, tepatnya pada bulan April dan Oktober. Bagi pembaca, penulis, dan yang melakukan akses situs jurnal yang ingin submit naskah ke jurnal ini, silakan mendaftar sebagai author kemudian login untuk submit naskah. Informasi penulisan dan submit naskah dapat diakses di author guidelines dengan mengikuti pentunjuk di situs jurnal.
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 16 Documents
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Search results for , issue "Vol 11, No 1 (2025): April" : 16 Documents clear
Peningkatan Kualitas Throat Weld pada Hasil Penetrasi Produk Bracket Spring dengan Metode DMAIC di Perusahaan Komponen Otomotif Prahara, Rahayu Budi; Wahyudi, Wahyudi; Sahrirudin, Wandi
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11611

Abstract

Component Automotive Indutry is a manufacturing company that focuses on making chassis frames and press parts, with the production delivered to ATPM (Single Agent Brand Holder) customers. One of the production lines at Component Automotive Indutry is the non-frame sub-assembly using welding robot A, which produces various components, such as spring bracket no. 1, spring bracket no. 2, spring bracket no. 3, and engine mounting bracket. To ensure welding quality, Component Automotive Indutry conducts various tests, including welding penetration tests, which are carried out in the company's laboratory using samples in accordance with the Quality Control Process Chart (QCPC). Over the past three months, the penetration test results on the spring no. 1 bracket showed a penetration rate of 82%, which did not meet the ATPM company's minimum standard of 100%. Faced with this problem, this study uses the DMAIC (Define, Measure, Analyze, Improve, Control) method to conduct process analysis and improvement. In the Define stage, the main problem identified was item throat penetration that did not meet the standard. The Measure stage then set a target of 100% penetration improvement. In the Analyze stage, the main causes of penetration instability were analyzed, identifying the vertical welding position as the main causal factor. The Improve stage was carried out by changing the welding position of the throat item from vertical to horizontal using a temporary jig. This change aimed to maintain gravity stability and achieve consistent penetration in accordance with the minimum standard of 4.2 mm. After conducting 9 trials, the improvement results showed that the welding penetration achieved 100% stability. The Control phase ensured that the implemented changes were continuously maintained to ensure consistent quality. This study concludes that changing the welding position from vertical to horizontal is significant in improving the quality and consistency of weld penetration on bracket spring no. 1 products at Component Automotive Indutry The findings underscore the importance of evaluating and adjusting the welding process to meet the quality standards set by customers.
Analisis Pengendalian Kualitas Produk Cover 012 dalam Mengurangi Jumlah Cacat Produk Menggunakan Metode Seven Tools di Pt Sinergi Pari Jaya Abadi Candra, Adi; Nugroho, Rendra Bagus Sapto; Taufik, Agus
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11643

Abstract

This study discusses defect control, focusing on the identification and handling of defects in various sectors, such as industry. The aim of the research is to analyze the main causes of defects and evaluate the control strategies that have been implemented. Using a data-driven approach and analytical methodology, this study provides recommendations to improve the effectiveness of defect control, minimize its impact, and create more integrated policies. The research results are expected to contribute to the development of more targeted company policies in reducing defects in various fields. PT Sinergi Pari Jaya Abadi, a company engaged in the production of various products, including Cover 012 products, faces challenges in maintaining consistent quality. One of the main issues faced by the company is the high defect rate in Cover 012 products, which affects increased production costs, reduced efficiency, and decreased customer satisfaction. This research aims to analyze the quality control of Cover 012 products at PT Sinergi Pari Jaya Abadi using the Seven Tools method. The study uses descriptive and qualitative methods with a Seven Tools approach to identify the root causes of product defects and propose improvements. The results show that the most dominant defect is NG Over Taping, accounting for 62.16% of the total identified defects. Fishbone Diagram analysis indicates that the causes of product defects include human, machine, and material factors. Proposed improvements include regular calibration to ensure machines continue to operate according to specifications, improving communication between the design, production, and QC teams to ensure a shared understanding of product sizes, and implementing a periodic inspection system during the taping process to detect errors early
Perencanaan Analisis Pengendalian Kualitas Untuk Menurunkan Cacat Thickness Produk Kemasan Sauce Powder Pada Mesin Extruder Dengan Metode Failure Mode and Effect Analysis (FMEA) Sinaga, Zulkani; Muhazir, Achmad; Dewi, Deby Cika
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11709

Abstract

PT. XYZ Packaging Division is a company engaged in the food sector, especially the packaging sector. In 1 year of sauce powder packaging production, there were defective products produced exceeding the company's permitted limits, and the highest defect value was 4.7%. The highest percentage of defects occurred in the extruder process, this study will focus on the analysis of defective products produced from the extruder process. The high level of defective products in the sauce powder packaging production process occurs in the extruder process, namely thickness variation type defects. To reduce the level of defective products that occurred in this study, failure mode and effect analysis (FMEA) and seven tools were used, this method can analyze and reduce the level of product defects through a product failure model based on calculations of severity, occurrence and detection, then the RPN (risk Priority Number) value will be known, the cause of failure that has the highest RPN, that is the possible cause of high defects produced in the production process. From the results of the study, it is known that the dominant factor that causes the high level of defects in thickness variations is caused by dirty material factors and problematic machine factors in the polymer flow process. The results of problem solving with FMEA and seventools obtained a significant reduction in the level of defects in the extruder process from 3% to 1.4%, the recommended improvement results can reduce the level of defects in the extruder process to below the standard set by the company, which is 2.5%.
Analisis Risiko Bahaya Ergonomi pada Lingkungan Kerja Unit Laundry Rumah Sakit dengan Metode Hazard and Operability Study (HAZOP) Lestari, Suci Ayu; Huda, Listiani Nurul; Ginting, Rosnani; Safitriyawi, Roja; Ulfah, Tya
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11918

Abstract

Hospitals as health and social organization bodies provide treatment, hospitalization, outpatient care, and various other activities carried out by workers both medical and non-medical, where interactions that occur dynamically and continuously have the potential for very risky hazards. This study aims to identify potential ergonomic hazards that exist in every work activity in the hospital laundry unit, especially those that can affect the comfort, safety and health of laundry workers. The identification of potential work hazards is conducted using the Hazard and Operability Study (HAZOP) method to evaluate ergonomic hazard risks. This evaluation is used to determine handling priorities based on the severity and likelihood of the occurrence of ergonomic hazards in hospital laundry. The results of the risk analysis found that the level of hazard risk in the hospital laundry unit is at a high level in the dirty linen collection section with the risk of exposure to contaminated linen with a total score of 15. Next in the weighing, separating and calculating section which comes from lighting with a total score of 12, awkward posture when lifting wet linen with a total score of 12, and finally in the drying section caused by machine noise with a total score of 12.
Penerapan Lean Six Sigma untuk Peningkatan Kualitas Crude Palm Oil (CPO) di Pabrik Kelapa Sawit Saputra, Arie; Hutagalung, Irna Monica; Fitriadi, Fitriadi
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11854

Abstract

This study aims to improve the quality of Crude Palm Oil (CPO) production at PT. Beurata Subur Persada through the Lean Six Sigma approach. The main problem faced by the company is the non-conformity of CPO quality to standards, especially Free Fatty Acid (FFA) levels, water content, and dirt content. To systematically identify and overcome the causes of defects, this study uses the DMAIC (Define, Measure, Analyze, Improve, Control) cycle combined with analysis tools such as Value Stream Mapping and Fishbone Diagram. The measurement results show that FFA levels are the most dominant type of defects with a DPMO value of 57,407 and a sigma level of 3.09, followed by water content and dirt content. Further analysis identified significant waste in the form of waiting, motion, defects, and overprocessing, which are caused by human, machine, method, raw material, and environmental factors. The Improve stage resulted in several recommendations for improvement such as limiting the storage time of FFB, operator training, regular machine maintenance, and using a digital recording system. The implementation of the solution showed an increase in sigma values and a decrease in the number of defects, indicating the success of the Lean Six Sigma approach in improving process capabilities. This research provides a real contribution to the application of data-based quality control methods in the palm oil industry, especially at the CPO processing level.
Optimalisasi Proses Pergantian Punch pada Mesin Bending dengan Metode Single Minute Exchange of Dies Wahyudi, Muzaki; Setiawan, Indra
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11562

Abstract

This research was conducted at a heavy equipment manufacturing company located in the West Java. The researcher was placed as an intern in the Production Engineering department, responsible for designing, managing, and improving production processes to ensure smoothness, efficiency, and quality in production. The study aimed to enhance the efficiency of the punch changeover process on the bending machine in the material preparation area using the Single Minute Exchange of Dies (SMED) method. The main issue identified was that the addition of new machines in the cutting process necessitated a faster forming process. By applying SMED, this research focused on reducing punch changeover time. The research method involved analyzing the punch changeover process on the YSD bending machine, implementing the separation of internal and external activities, and designing a custom trolly to facilitate the transportation and arrangement of equipment. The results showed that the application of SMED successfully reduced punch changeover time by 1.12%, from 1780 seconds to 1760 seconds. Additionally, with the introduction of a custom trolly, the efficiency of punch changeover further increased, resulting in a total reduction in punch changeover time of 38.31%, from 1780 seconds to 1098 seconds. This underscores the importance of combining various process improvement methods to achieve optimal results in enhancing production efficiency
Human Resource Development Analysis Using SOAR Analysis and QSPM Analysis (Case Study at CV. Mustika Digdaya) Deviyanti, I Gusti Ayu Sri; Widari, Nyoman Sri; Fais, Moh. Ainul
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11573

Abstract

The purpose of this research is to explain the process of training and developing human resources at the Fan Sate soy sauce factory in Probolinggo Regency. The sources of information in this study were factory owners and workers. The methods used in this study are qualitative–descriptive methods using data collection techniques in the form of observation, interviews, transportation, and documentation. The analysis results found that the Fan Sate soy sauce factory applied several methods in employee training, such as learning methods, work instruction training, and work training. As for employee development, the Fan Sate soy sauce factory uses job rotation and training methods. The research uses SOAR (Strengths, Opportunities, Aspirations, Results) and QSPM (Quantitative Strategic Planning Matrix) analysis. The development of mentorship or coaching programs has become an important strategy in improving the leadership and skills of employees in various organizations. Through mentorship or coaching relationships, employees get insights and feedback directly from an experienced mentor or coach, which can accelerate their learning process and improve their performance. Thus, the program is not only beneficial to the individuals involved but also has a positive impact on the entire organization.
Rekayasa Ulang terhadap Pengendalian Kualitas Gulungan Benang Polyester 20s pada Mesin Winding Menggunakan Metode Statistical Quality Control (SQC) dan Failure Mode and Effect Analysis Taufik, Taufik; Nurrokhman, Agus
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11566

Abstract

PT. Primayudha Mandirijaya is a manufacturing company operating in the textile sector. Customer satisfaction is the main goal. Therefore, production quality always comes first. However, there are problems in making this happen, namely that there are often defects in spools of 20s polyester, because these defects greatly exceed the production limit set by the company, namely 5% of total production. The aim of this research is to find out directly the problems that occur in the production process, as well as to find out the resolution of problems that occur on winding machines. To make this happen, the Statistical Quality Control (SQC) method is used. To determine the possibility of failure, the Failure Mode and Effect Analysis (FMEA) method is used. SQC is used to control product quality, reduce or prevent product failures, while FMEA is used to identify potential failures in the production process. The results of research using the Statistical Quality Control method, the defect rate of 44.67% in Stitch can be reduced to 43.97% and the defect rate of 36.07% in Swelled Package can be reduced to 29.36%. In the Failure Mode and Effect Analysis method, the factors causing defects are influenced by a lack of attention to components and maintenance on the machine, so the maintenance team is recommended to carry out regular check-ups on the condition of the machine every day. Before repairs were carried out, total defects from January to September reached 68,231.52 or 5.28% of production output. After improvements, the number of defects decreased in October to 6,831.72 or 4.53%. Thus, this research is able to reduce defects in spools of 20s polyester thread by 0.75%.
Efektifitas Kinerja Produksi Air Bersih pada Perusahaan Daerah Air Minum (PDAM) XYZ Menggunakan Metode Objective Matrix (OMAX) Marlinda, Marlinda; Hartati, Rita; Hidjrawan, Yusi
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11861

Abstract

This study aims to determine the performance of clean water production at PDAM XYZ. The method used is the Objective Matrix (OMAX). In the formation of the Omax matrix, values are required in the form of actual values, actual scores, productivity values, and descriptions of each ratio. The results of the study show that the Overall Productivity (OP) value shows that the productivity of the XYZ Regional Drinking Water Company (PDAM) in producing clean water as a whole from 2021 to 2024 has increased and decreased. The highest Overall Productivity (OP) value is in 2022 at 601, where overall the actual score for each ratio is not included in the bad category. The lowest Overall Productivity (OP) value is in 2023, this is because in 2023 for ratio 6, namely about effectiveness, which has an actual score of only 1, it is included in the bad category. After experiencing a decline in productivity, in 2024 the company's overall productivity value increased again. So it can be concluded that the best performance and productivity that occurred during 2021 to 2024 was in 2022, this can be seen from the overall productivity value in 2022 which was 601. Meanwhile, the worst performance and productivity occurred in 2023, this can be seen from the very low overall productivity value in 2023, which was only 388.
Prospek Ekonomi Peremajaan Perkebunan Kelapa Sawit Rakyat: Analisis Kelayakan di Tingkat Petani, Kabupaten Nagan Raya Irawan, Heri Tri; Arga, Dwi Prasiska Lena; Hasnita, Hasnita; Pandria, T.M. Azis; Ulhaq, Riza; Pamungkas, Iing; Hadi, Khairul; Saputra, Arie; Muzakir, Muzakir
Jurnal Optimalisasi Vol 11, No 1 (2025): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i1.11777

Abstract

This research aims to analyze the financial feasibility and sensitivity of investment in the rejuvenation of smallholder oil palm plantations in Lungmane Village, Kuala Pesisir Subdistrict, Nagan Raya Regency, Aceh Province, amidst the problem of declining Fresh Fruit Bunch (FFB) productivity due to aging trees. The research method used is quantitative analysis with investment criteria of Net Present Value (NPV), Internal Rate of Return (IRR), Net Benefit-Cost Ratio (Net B/C), and Payback Period (PP), as well as sensitivity analysis to changes in FFB prices. The results of the analysis show that the rejuvenation project for smallholder oil palm plantations in Lungmane Village is financially feasible based on positive NPV, IRR, Net B/C, and Payback Period indicators. However, the sensitivity analysis reveals that the project's feasibility is highly influenced by fluctuations in FFB prices, where a price decrease of up to 70% can render the project unfeasible. This study concludes that although the rejuvenation of smallholder oil palm plantations in Lungmane Village has good financial prospects, farmers need to be aware of the risk of declining FFB prices.

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