Article Per Year (5 Year)
p-Index From 2021 - 2026
6.408
P-Index
This Author published in this journals
All Journal Jurnal Teknoin JURNAL PASTI (PENELITIAN DAN APLIKASI SISTEM DAN TEKNIK INDUSTRI) JISI UMJ (Jurnal Integrasi Sistem Industri UMJ) Journal Industrial Servicess JMPM (Jurnal Material dan Proses Manufaktur) PERFORMA : Media Ilmiah Teknik Industri Jurnal Teknik Industri : Jurnal Hasil Penelitian dan Karya Ilmiah dalam Bidang Teknik Industri Jurnal Inotera Jurnal Serambi Engineering Jurnal INTECH Teknik Industri Universitas Serang Raya Jurnal Ilmiah Teknik Industri Matrik : Jurnal Manajemen dan Teknik Industri Produksi Scientific Journal of Mechanical Engineering Kinematika G-Tech : Jurnal Teknologi Terapan Diseminasi : Jurnal Pengabdian kepada Masyarakat Jurnal Rekayasa Industri (JRI) Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Jurnal Optimasi Teknik Industri (JOTI) Indonesian Journal of Industrial Engineering & Management Journal of Industrial View JURNAL TEKNIK INDUSTRI Jurnal Pengabdian Masyarakat Bangsa Journal of Community Services in Sustainability Journal Serambi Engineering (JSE) Spektrum Industri
Sumasto, Fredy
Politeknik STMI Jakarta
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

Published : 49 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 49 Documents
Search

 1   2   3   4   5 
Reducing Defects Using DMAIC Methodology in an Automotive Industry Imansuri, Febriza; Chayatunnufus, Tasya; Safril, Safril; Sumasto, Fredy; Purwojatmiko, B. Handoko; Salati, Dianasanti
Spektrum Industri Vol. 22 No. 1 (2024): Spektrum Industri - April 2024
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/si.v22i1.171

Abstract

Quality is when it meets the wants and expectations of customers or even exceeds them. Every company must raise the quality of its current products and services. A complete and adaptable approach for establishing, maintaining, and maximizing company success is Six Sigma. Define, Measure, Analyze, Improve, and Control (DMAIC) is one of the tools used to implement Six Sigma. PT. KRM is one company engaged in the automotive sector, which produces Colt Diesel trucks. This research focuses on the welding processes. Defective products were found in as much as 5% of total production, exceeding the company's target of 3%. This research was conducted to determine the process capability based on product defects with the Six Sigma DMAIC method approach, then to find out the proposal for implementing quality control by analyzing the causes of defects in the production process and then looking for continuous improvement with the 5W+1H concept. The improvement was made to decrease the DPMO value of 4.496 and increase the sigma value of 0.19. This study demonstrates how the Six Sigma DMAIC approach can improve the quality of the cabin production process for the part side outer pillar LH. This case can help company managers apply Six Sigma methods to solve complex problems in other processes.
Sustainable Transport Assessment through Passenger Density and Operational Headway Sumasto, Fredy; Gurning, Ridho Hans; Pratama, Indra Rizki; Arohman, Abdul Wahid; Purbaningrum, Sanurya Putri
Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Vol. 12 No. 3 (2025): November
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/j.mtl.v12i3.1991

Abstract

This study investigates the operational performance and sustainability of two urban minibus routes D41 (Gandaria–Cibinong) and D37 (Cibinong–Kampung Rambutan) in the Depok–Bogor region of Indonesia. Using field observations and GPS-assisted time tracking, three indicators were analyzed: passenger load factor, operational headway, and travel time. Results show that while both routes exceeded the government’s 70% load factor benchmark during peak hours, performance dropped below 50% at midday. Headway generally remained within the acceptable range of 2–5 minutes, but D37 exhibited the shortest intervals during morning peaks. D37 also experienced prolonged travel times, often exceeding 80 minutes. These findings highlight the inefficiencies of informal public transport systems, particularly their inability to scale services to match fluctuating demand. This study proposes a low-cost, data-driven framework for assessing route efficiency and supports the integration of informal routes into broader transport planning. The results are relevant to urban mobility reform in developing cities.
CRAFT Method to Minimize Material Handling Cost in Automotive Component Industry Aisyah, Siti; Ra, Taufiqurrahman; Sumasto, Fredy; Imansuri, Febriza; Aminudin, Muhammad; Rusmiati, Emi
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 6, No 3: October 2025
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v6i3.25388

Abstract

In automotive component manufacturing, an efficient plant layout minimizes material handling costs (MFCs). The problem is the high material handling costs for the production of 2DIN Radio Bracket MK 56660 at PT XYZ because it is produced at two factories, Factory 1 and Factory 9, which are pretty far apart. Using the Computerized Relative Facility Allocation Technique (CRAFT), this study aims to optimize the plant layout by exploring alternative configurations that facilitate cost-effective material handling. The initial assessment of the 2DIN Radio Bracket MK 56660 layout revealed a material transfer cost. Applying the CRAFT method, two different alternative proposals for layout improvement emerged. The first alternative showed a reduction in material transfer costs of IDR 476.11. In contrast, the second alternative resulted in a slightly higher cost of IDR 476.21. The study findings concluded that the first alternative, with the lowest cost of IDR 476.11, is the preferred choice to improve the plant layout and minimize MMF. This study provides practical insights into plant layout optimization in the automotive component industry and underscores the effectiveness of the CRAFT method in identifying cost-effective solutions to material handling challenges.
Comparative Study of Macro Program Machining and CAM 2.5D Machining for Press Dies Manufacturing Permana, Al Kautsar; Aji, Reza Melliyanno Putra; Arohman, Abdul Wahid; Sumasto, Fredy; Agustin, Desy
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 8 No. 2 (2024): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v8i2.22150

Abstract

The manufacturing industry extensively utilizes machining and casting processes for die fabrication. Due to the inherent dimensional inaccuracies and surface roughness of casting, machining is often required to achieve desired accuracy and finish. Traditional computerized numerical control machining relies on individual programming using macro programming or computer-aided manufacturing software for operations such as facing, which can be inefficient and prone to error. This study aims to evaluate and compare the efficiency and accuracy of macro programming and CAM 2.5D in CNC milling specifically for press die manufacturing. Macro programming is used for automating complex and repetitive machining by incorporating variables, expressions, and logic directly to machine whereas CAM 2.5D refers to programming using software in G-code format with capability to work not only two-dimensional planes but also limited vertical movement. Experimental results indicate that CAM 2.5D offers a time-saving advantage by about 2 hours while macro programming allows for greater accuracy in machining. Industries are encouraged to utilize both macro programming and CAM 2.5D to achieve a balance of speed, accuracy, and flexibility, optimizing their CNC machining processes for both large-scale and precision-focused operations.
Design Improvement of Mold Bracket for Quarter Trim to Reduce Ejector Mark Defects Agustin, Desy; Ma’ruf, Muhammad Irvan Tantyagus; Solih, Edwin Sahrial; Nurhadi, Fadhil Fadhlurrohman; Sumasto, Fredy
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 1 (2025): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i1.24939

Abstract

This study focuses on improving the quarter trim bracket mold in the mold making division to mitigate the risk of ejector marks, which were identified through long-term analysis. The author redesigned the mold by considering the ejector layout, cooling layout, clamping force calculations, and number of pressure plates, to ensure the product is free from defects. The addition of an ejector pin in the rib area is proposed as a solution to minimize this problem. The quarter trim bracket mold is designed using two pressure plates measuring 30 x 60 mm and four measuring 30 x 80 mm, with a total pressure plate area reaching 13,200 mm². Based on calculations, this part requires a clamping force of 14.5 tons to be produced on a 30 ton capacity injection machine. This clamping force is important to keep the mold tightly closed during the production process, and is calculated based on the cavity pressure in the mold and the shot area. All mold designs are created following company standards to ensure accuracy of sizes and calculations. This research is expected to improve production quality and operational efficiency.
Designing Factory Layout and Facilities for Car Front Door Production with CORELAP: A Case Study at PT GMI B. Handoko Purwojatmiko; Fredy Sumasto; Takbir Dhuha Shaffah Ahmad; Shafira Fitriani Hastin
Performa: Media Ilmiah Teknik Industri Vol 24, No 1 (2025): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering, Faculty of Engineering, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.24.1.86833

Abstract

The automotive manufacturing industry is experiencing significant development and has increasingly complex market demand dynamics. The industrial transformation resulting from these developments has had a significant impact on several automotive manufacturing companies. The value of production efficiency, on-time delivery, and product quality means that companies must have the right strategy in meeting customer demand. Fulfilling customer requests can be realized by opening new adequate facilities. Factory layout and facility design can be a key factor in achieving this goal, especially in the production of front door components model. This research aims to comprehensively detail the design of the factory layout and facilities using the CORELAP method. CORELAP implementation involves collecting supporting data, including Operation Process Chart (OPC), Routing Sheet, Floor Area Requirement, Activity Relationship Chart (ARC), and Activity Relationship Diagram (ARD). The CORELAP method prioritizes spatial relationships to ensure that closely related facilities are strategically located. Design This layout design was created to provide an overview of the strategy for structuring production facilities and their supports to produce an effective and efficient design. Apart from the overview, the analysis carried out can also provide space for stakeholders to be able to utilize the CORELAP strategy in creating new factory layouts and facilities to support improving the company's work performance and meet customer satisfaction. The cost of material handling is calculated to determine the expenses involved in establishing a production facility for car front doors, totaling IDR 763,959. This cost is approximately 10% lower than the current material handling cost, which is IDR 856,888. The results of this research are design proposals that can be utilized or taken into consideration by industrial stakeholders.
OPTIMASI DESAIN MOLD COVER TOWING FRONT BUMPER MELALUI SIMULASI MOLDFLOW UNTUK MENGURANGI CACAT PRODUK Abdul Wahid Arohman; Andi Muhammad Hanif Tjoppo; Edwin Sahrial Solih; Sanurya Putri Purbaningrum; Desy Agustin; Fredy Sumasto
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 1 (2025): SJME Kinematika Juni 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i1.725

Abstract

Plastic injection molding is a method of forming a product that uses plastic (Polymer) as the main material. The resulting product must have as few defects as possible because it will reduce the quality value and customer satisfaction. In this study, the mold was made for the Front towing bumper cover product with the design and simulation stages. The simulation process uses Moldflow Software to identify possible product defects that occur with variations in melt temperature of 200, 240, and 280 (°C). The result obtained in this simulation is the optimal melt temperature for producing products in the injection molding process by selecting a temperature of 240°C. This temperature is the most optimal because it has faster fill time and cooling time, with an optimum percentage of 25% compared to the temperatures of 200 and 280 (°C). In potential defects such as air traps, weldlines, and shinkmarks, a temperature of 240 (°C) has fewer potential defects than 200 and 280 (°C).
EVALUASI DESAIN RANCANG BANGUN PUNCH DAN DIE MENGGUNAKAN SIMULASI STATIK SEBAGAI QUALITY CONFIRMATION Edwin Sahrial Solih; Ahmad Arif; Sanurya Putri Purbaningrum; Desy Agustin; Abdul Wahid Arohman; Fadhil Fadhlurrohman Nurhadi; Fredy Sumasto
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 1 (2025): SJME Kinematika Juni 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i1.727

Abstract

Modern manufacturing industries demand high efficiency and consistent product quality, especially in metal forming processes such as stamping dies. An accurate punch and die design essential to ensure the success of bending operations, particularly for metal-based products like forks. This study aims to evaluate the structural reliability of punch and die designs through a static simulation approach as a quality confirmation method prior to manufacturing. The methodology includes die geometry design, selection of SKD11 tool steel based on its mechanical properties, and stress analysis using SolidWorks software under a static load of 35 tons. The stress distribution was analyzed using the Von Mises method, and the Factor of Safety (FOS) was calculated as a design safety indicator. Simulation results show that the maximum stress on the die was 9.91 × 10⁷ N/m² and on the punch was 1.01 × 10⁸ N/m², both well below the yield strength of SKD11 (6.88 × 10⁸ N/m²). The FOS values of 3.47 for the die and 3.26 for the punch confirm structural safety. Validation through trial dies and 3D scanner measurements indicated dimensional deviations within the acceptable tolerance range. This approach effective for improving design accuracy and production efficiency in stamping die manufacturing.
Evaluation of Work Posture Using the REBA Method and Ergonomic Intervention at the Gelora Bakery MSME in Jakarta Pratama, Indra Rizki; Sumasto, Fredy; Imansuri, Febriza; Salati, Dianasanti; Purwojatmiko, B. Handoko
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8455

Abstract

Micro, small, and medium enterprises (MSMEs) play a crucial role in community economic development, yet many neglect occupational safety and health (OSH) and ergonomic considerations for their workforce. An initial assessment at Gelora Bakery, a small-to-medium bakery enterprise in Jakarta, revealed significant ergonomic and safety deficiencies. Workers frequently engaged in unsafe manual handling tasks—bending awkwardly while lifting heavy loads such as flour sacks, baking material buckets, and butter containers without mechanical support. These unsafe working conditions pose a substantial risk of work-related musculoskeletal disorders (WMSDs) among workers. To address these concerns, this research employs the Rapid Entire Body Assessment (REBA), a standard ergonomic evaluation method, to systematically assess worker postures and quantify the risk of musculoskeletal injury. Based on the results of the REBA assessment, the highest score obtained was 10. This rating indicates a high-risk category and requires implementation of changes. This study formulates evidence-based recommendations for improving workplace safety and worker posture at Gelora Bakery. The implementation of ingredient storage shelves represents the primary intervention recommended to create a safer, healthier, and more efficient work environment.
Co-Authors Abdul Wahid Arohman Adhitya Nugraha Duwan Putra Adrian Januar Wahab Ahlan Ismono Ahlan Ismono Ahmad Arif Aisyah, Siti Aji, Reza Melliyanno Putra Al Kautsar Permana Aldi Maulana Ali Rachman Hakim Aminudin, Muhammad Amrin Rapi Andi Muhammad Hanif Tjoppo Anita Putri Permatasari Ardy Riyanto Arif Dzulfikar Arif Muttaqin Aritama, Ditya Arrofah, Muhammad Arif Azzahra, Sabrina B. Handoko Purwojatmiko Bayu Samudra Bifadhlih, Nafroh Busharmaidi Cantika Puspa Maharani Cessari, Raissa Annisa Chayatunnufus, Tasya Desy Agustin Dewi Auditiya Marizka Dianasanti Salati Emi Rusmiati Emi Rusmiati Fadhil Fadhlurrohman Nurhadi Fathullah, Abi Sufyan Feby Gusti Dendra Hakim , Ali Rachman Hakim, Ali Rachman Hermawan, Yuda Ibnu Syihab Ikhsanjani, Abdul Malik Imansuri, Febriza Indah Kurnia Mahasih Lianny Indra Rizki Pratama Irma Agustiningsih Imdam Isma Wulansari Isma Wulansari Ismono, Ahlan Kristanto, Putri Andini Kristofer Simanjuntak Kurnianto, Radif Lai, Kenny Laksmi Ambarwati Ma’ruf, Muhammad Irvan Tantyagus Mohammad Wirandi Muhamad Agus Muhamad Fahrul Rozi Muhamad Zen Muhammad Aminuddin, Muhammad Muhammad Raihan Akbar Muhammad Riezqi Ibrahim Muhammad Ryas Anugrah Sahnun Muhammad Zen Nurhadi, Fadhil Fadhlurrohman Paramita, Astriyani Sandya Prajoti, Harzya Dahmar Prajoti Putra Satria Ra, Taufiqurrahman Rafi Ramadhani Jiwanto Rahmat Dwi Febriyanto Rahmat Dwi Febriyanto Rangkuti, Indra Yusuf Reza Melliyanno Putra Aji Ridho Hans Gurning Rifqi Syahputra Awani Rozi, Muhamad Fahrul Rozi, Muhammad Fahrul Rusmiati, Emi Safril Safril Safril Salam, Suriadi A. Samudra, Bayu Samudra, Bayu Sanurya Putri Purbaningrum Saputra, Alfiolani Saputra, Yogi Pangestu Satria, Adam Sayidina, Anabel Marcia Septian Adi Cahyo Shabrina Razan Putri Pribadi Shafira Fitriani Hastin Shafiratul Fajri Harisul Husna Shafly, Naufal Lukman Siti Aisyah Siti Aisyah Soekarno, Rahadyan Jyestha Soekarno Solih, Edwin Sahrial Sri Hasyib Saputri Supardi Suroso, Finna Syaeful, Muhamad Eryl Saputra Syarifudin, Ahmad Syarifudin Takbir Dhuha Shaffah Ahmad Teguh Fathurohman Vebriyanti Hayoto Violeta, Kesya Anatama Violeta Wilda Sukmawati Wirandi, Mohammad Wulansari, Isma Wulansari Yesaya Abdi Nugroho