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All Journal Jurnal Teknik Industri KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan TEKMAPRO Journal of Industrial Engineering and Management JISI UMJ (Jurnal Integrasi Sistem Industri UMJ) REKAYASA Sistemasi: Jurnal Sistem Informasi Journal of Industrial Engineering Management EKONOMIS : Journal of Economics and Business STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Matrik : Jurnal Manajemen dan Teknik Industri Produksi Jurnal Teknik Industri Terintegrasi (JUTIN) Academia Open Nusantara Science and Technology Proceedings Indonesian Journal of Industrial Engineering & Management Juminten : Jurnal Manajemen Industri dan Teknologi Journal La Lifesci Journal La Multiapp Indonesian Journal of Innovation Studies JAMBURA: JURNAL ILMIAH MANAJEMEN DAN BISNIS Jurnal Teknik Mesin, Industri, Elektro dan Informatika Jurnal Kendali Teknik dan Sains IIJSE Journal Serambi Engineering (JSE)
Rr. Rochmoeljati
Department Of Industrial Engineering, Faculty Of Engineering And Sains, Universitas Pembangunan Nasional Veteran Jawa Timur, Surabaya 60294, Indonesia
Aerospace Engineering 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 Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Defect Analysis Using Fault Tree Analysis and Failure Mode Effect Analysis in Rubber Roll Production Rr. Rochmoeljati; Isna Nugraha
Nusantara Science and Technology Proceedings 4th International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2023.3627

Abstract

XYZ is a company operating in the manufacturing and rubber roll service industry located in Indonesia. The frequent issue within the company is the occurrence of product rejects, leading to inefficient production processes. The research is conducted using the Fault Tree Analysis (FTA) method with recommendations for improvement from the Failure Mode and Effect Analysis. This method is employed to identify the causes of product rejection and provide preventive solutions to avoid such rejections. There are three types of rejects at PT. XYZ, namely blisters rejection with a probability of 1.137%, material impurities rejection with a probability of 1.18%, and PU rejection with a probability of 1.152%. The root causes of these rejections include operators rushing, operator fatigue, machines in need of maintenance, very short production deadlines, operator laziness, incomplete environmental cleanliness facilities, and operators joking around while working. As for recommendations to reduce and prevent the recurrence of these three types of rejections, they include regular machine maintenance, providing customers with longer estimated completion times than the actual estimates, and offering rewards to operators who meet targets without making errors.
Supply Chain Risk Assessment and Mitigation in Sugar Industry Sinta Dewi; Rr. Rochmoeljati; Chori Dwi Azizah; Christabela Jesselyn
Nusantara Science and Technology Proceedings 4th International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2023.3637

Abstract

In the fulfillment of consumer needs, companies can experience several risks. To overcome possible risks, companies must be able to manage the supply chain effectively. The sugar industry has a complex supply chain, and at each stage of the supply chain, some risks must be taken into account. The purpose of this study is to determine the risks that may occur and prioritize risk mitigation strategies to minimize existing risks. This study uses the House of Risk method. From the results of House of Risk Stage 2, 13 risk mitigation actions were obtained to propose solutions to minimize the occurrence of risk agents.
Analysis of Waste in the Warehousing Process of PT. Asia Plastik sing Lean Warehousing and Improvement Strategy with Kaizen Method Putra, M. Rizqy Ifaldhi; Rochmoeljati, Rr.
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 2: June 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i2.22741

Abstract

PT Asia Plastik is a plastic packaging manufacturing company that specializes in injection and blow molding. In its warehousing management, PT Asia Plastik often experiences excessive waste with a high lead time of 419 minutes with a value added of 276 minutes. The method used is the application of Lean Warehousing with the Value Stream Mapping (VSM) method for mapping the flow of warehousing and information flow in the company, and making Process Activity Mapping (PAM) as an analysis tool. With Process Activity Mapping (PAM), it can be seen which process (time) is really important and which process (time) can be simplified or eliminated. A total of 50 activities were obtained with details of 16 Value Added activities, 7 Non-Value Added activities, and 27 Necessary Non-Value Added activities. Based on the results of the research, activity simplification and Big Picture Mapping were proposed with a total of 36 new activities compared to 50 old activities, a reduction of 14 activities. Then the time obtained is 370 minutes which was previously 419 minutes, saving 49 minutes. In addition, there are also proposals for improvement with the Kaizen method to reduce existing waste.
Quality Control of Janggelan Products Using Statistical Quality Control (SQC) and Failure Mode Effect Analysis (FMEA) Methods in UD. Rizqi Agung Faizal, M. Rizki Nur; Rochmoeljati, Rr.
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 2: June 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i2.22738

Abstract

UD. Rizqi Agung is one of the SMEs in Ngrayun, Ponorogo. This SMEs is one of the medium-sized SMEs that produces packaged drinks. The packaged drinks produced are drinks made from janggelan juice. UD. Rizqi Agung has a production process that is still semi-manual so that there are still products that still have defects in these products. The methods used are Statistical Quality Control (SQC) and Failure Mode and Effect Analysis (FMEA). SQC tools are check sheet, stratification, histogram, paretto diagram, scatter diagram, control chart, and cause and effect diagram. While FMEA is used for improvement of the results of the cause and effect diagram. Based on the results of research on Sari Janggelan products, the most dominant defect is obtained, namely Cup Dent defects (4.06%), followed by Leak defects (2.84%), Dented Cardboard defects (1.30%), and Label not Symetric defects (1.22%). Proposed improvements with FMEA obtained risks that have the highest priority level to make improvements to minimize the possibility of errors. The highest RPN values is 320 and 288 of the type of cup dent defect with proposed improvement recommendations, namely changing cup vendors to match the quality requested by SMEs and monitoring employee performance.
Usulan Perencanaan Tata Letak Gudang Bahan Penolong Menggunakan Metode Class Based Storage di PT. XXX Muhammad Hadziqul Afkar; Rr Rochmoeljati
Jurnal Serambi Engineering Vol. 10 No. 1 (2025): Januari 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Warehouses play an important role in the logistics management of manufacturing companies, especially in supporting the smooth production process of PT. XXX, as the most complete fertilizer manufacturer in Indonesia. There are problems regarding the management of auxiliary materials warehouse, such as overstocking of some materials and sub-optimal warehouse layout. The purpose of this research is to optimise the warehouse layout of auxiliary materials at PT XXX by using the class-based storage (CBS) method and the fast moving, slow moving and non-moving (FSN) classification approach. The research method includes primary data collection through observation and interviews, as well as secondary data from the company's warehouse management system and references. According to the FSN analysis, there are three fast moving materials, seven slow moving materials and two non-moving materials. The layout optimisation results show that the main fast-moving materials increased by 10%, Al(OH)3 by 13% and Rough Jumbo Dolomite by 71%. In addition, non-moving materials such as acid clay and ferrous sulphate were removed, reducing the capacity of red clay by 64%. In this way, the class-based storage approach allows warehouse management to be more structured, efficient and responsive to operational needs.
Analisis Keseimbangan Produksi Lower Holder dengan Pendekatan Line Balancing Pada PT. XYZ Alvionita, Selvi; Rochmoeljati, Rr.
JISI: Jurnal Integrasi Sistem Industri Vol. 12 No. 1 (2025): JISI UMJ
Publisher : Fakultas teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jisi.12.1.103-116

Abstract

Penelitian ini bertujuan untuk menyeimbangkan produksi lower holder dengan melakukan pembagian tenaga kerja yang seimbang, dan merancang aliran proses serta tata letak produksi yang efisien untuk meminimalkan waktu tunggu. Metode yang digunakan dalam penelitian ini adalah Ranked Positional Weight, Largest Candidate Rule, dan Kilbridge and Wester. Hasil penelitian menggunakan metode perusahaan line efficiency sebesar 62%, balance delay sebesar 38%, dan smoothness index sebesar 686,1. Metode Ranked Positional Weight line efficiency sebesar 62%, balance delay sebesar 38%, dan smoothness index sebesar 220,73. Metode Largest Candidate Rule line efficiency sebesar 62%, balance delay sebesar 38%, dan smoothness index sebesar 226,89. Metode Kilbridge and Wester line efficiency sebesar 62%, balance delay sebesar 38%, dan smoothness index sebesar 205,82. Maka dapat dipilih metode Kilbridge and Wester sebagai metode terbaik karena memiliki nilai smoothness index yang lebih kecil. Rekomendasi penelitian selanjutnya dapat mempertimbangkan faktor kendala teknis pada penggunaan mesin dan fasilitas produksi diperusahaan agar hasil penelitian dapat lebih optimal.
Optimization of Production Capacity Jumbo Bag by Method Theory of Constraints Brilian, Delinda; Rochmoeljati, Rr.
Journal La Multiapp Vol. 6 No. 2 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i2.1920

Abstract

PT. XYZ is a company engaged in production jumbo bag with a capacity of 500–2000 kg. Increased demand occurred in jumbo bag with a capacity of 500 kg which causes problems in the production process, especially at work stations Cutting (SK-4), which experienced obstacles in the form of bottleneck due to limited resource capacity. This condition hampers efficiency and productivity, so that companies are unable to meet production targets during the period May to October 2024. This research aims to optimize production capacity jumbo bag by applying Theory of Constraints (TOC) through approach Drum-Buffer-Rope And Linear Programming which is processed using software POM-QM. Research stages include identification constraint, exploitation constraint, non-subordinatin constraint, as well as elevation constraint. From the results of this research, a solution was obtained in the form of addition shift work at the station Cutting (SK-4) through reduction shift at the station Needle Loom (SK-3) without reducing the number of operators, managed to increase the efficiency of the production process significantly. The implementation results show an increase in production time capacity from 129511 minutes to 291399.8 minutes (an increase of 26%) as well as an increase output production of 1,476 unit to 3,320 unit. Thus, the company managed to overcome obstacles bottleneck, increase operational productivity, and achieve predetermined production targets more optimally.
Analysis Defect Products in Silencers Using the New Seven Tools Method Annandita, Alifia Rizky; Rochmoeljati, Rr.
Journal La Multiapp Vol. 6 No. 2 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i2.1986

Abstract

Quality is important for a product so that it can have more value than other products. To maintain quality, quality assurance (quality) is required. As is the case with silencer products produced by CV. Nyoto Plastik, silencer is a product that must maintain its quality value. Therefore, many defects in silencer products must be repaired by analyzing the causes of the defects. Based on research, the average defect in this silencer product reaches 10% within one year. New Seven Tools is a method for finding out the causes of defects based on humans, methods, materials, machines or the environment by using the seven tools contained in it. Therefore, this research aims to help maintain the quality of silencers by analyzing the causes of defects and providing suggestions for improvements to minimize defects that occur using the New Seven Tools method.
Optimization of the Production Process using the Theory of Constraints (TOC) Method based on Drum-Buffer-Rope (DBR) Improvements Widyarsa, Destiara Nabila; Rochmoeljati, Rr.
Sistemasi: Jurnal Sistem Informasi Vol 14, No 4 (2025): Sistemasi: Jurnal Sistem Informasi
Publisher : Program Studi Sistem Informasi Fakultas Teknik dan Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v14i4.5292

Abstract

One footwear manufacturing company located in Surabaya has experienced an increase in production demand for both women's and men's sandals in recent years. The main issue faced by the company is the presence of bottlenecks at specific workstations due to unbalanced capacity, which disrupts the smooth flow of the production process. To address this issue, the study applies the Theory of Constraints (TOC) method based on the Drum-Buffer-Rope (DBR) concept, in combination with Linear Programming (LP). The research stages include identifying the constraints, exploiting the constraints, subordinating non-constraints, and elevating the constraints. The analysis results indicate that the coating and bonding workstations are the main constraints affecting the system's throughput. To overcome this, overtime was added at these workstations to increase production capacity. The implementation results showed an improvement in throughput from IDR 39,849,260 with 1,594 units to IDR 46,490,330 with 1,860 units, reflecting a 14.3% increase. These findings demonstrate that the application of TOC and DBR can effectively balance the production flow, optimize bottleneck workstations, and enhance overall production throughput.
Woven Bag Production Scheduling With Heuristic Pour Algorithm and Earliest Due Date Afriza, Ajeng; Rochmoeljati, Rr.
Journal La Multiapp Vol. 6 No. 3 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i3.1971

Abstract

PT. XYZ is a company engaged in manufacturing, especially in producing woven bags, which are plastic sacks made of Polypropylene (PP). PT. XYZ faces the problem of too long makespan time in the application of the First Come First Serve (FCFS) method. Although considered simple, FCFS is less efficient in complex production, especially with variations in processing time. As a result, jobs with longer processing times are often prioritized, resulting in delays in shorter jobs. This causes a longer total completion time and requires the implementation of a more efficient scheduling method to minimize makespan and improve production performance. The purpose of this study was to determine the optimal woven bag production job and to reduce makespan and delays in woven bag production with the Heuristic Pour Algorithm and Earliest due date (EDD) at PT. XYZ. From the calculation results using the first come first serve method with the job sequence 1-2-3-4-5-6, the total makespan value was 33119 or 551 hours 59 minutes. Meanwhile, the calculation using the heuristic pour algorithm method and Earliest due date (EDD) obtained the sequence of jobs 3-2-4-1-6-5 with a total makespan of 28528 minutes or 475 hours 28 minutes. The calculation using EDD also showed a decrease in lateness for each job, where the lateness of job 3 was the smallest, namely -10 days with a due date of 17 days. Based on this research, the percentage decrease in makespan value was 13.86%.
Co-Authors Adham Roihan Azriel Irfani Afriza, Ajeng Agustina, Mega Ahyaliya, Marsya Laila Alief Wahyu Pratama Alvionita, Selvi Amalia, Rochmatul Anasari, Sofia Fitri Annandita, Alifia Rizky Benedictus Vibriyanto Bagas Prakosa Berliana Dian Novitasari Brilian, Delinda Budiani, Dian Nissa Fitri Bustomy, Andrean Chori Dwi Azizah Christabela Jesselyn Dimas Wandhika D Dira Ernawati Endang Pudji Widjajati Erlina Erlina Faizal, M. Rizki Nur Fenny Novianti Ferina Indah Lusiana Ferraldo Kusuma Artono Putra Fibio Isnando Hariatmaja Pradana Fuadah, Layin Hidayatulloh, Faishal Iriani Iriani Isna Nugraha Ivonne Rakha Salsabila Kamal Husein Khusnun Nabila Mardila Nur Imamah Maunah, Dewi Aisarunnisa' Meisufi, Ruro Wiranti Moch Taufik Hidayat Mochamad Ismail Zakaria Muhammad Hadziqul Afkar Muhammad Rizki Kurniawan Nafa Artha Cahaya Mulia Nafa Artha Cahaya Mulia Nugraha, Isna Nugroho, Rosa Novarian Agninditya Pradana, Billy Gandis Prakosa, Albertus Adriyanto Satrio Pramudya, Kaka Arya Primadhiya, Fairuzzayyan Putra, M. Rizqy Ifaldhi Raditya Dwi Firmansyah Raditya Y E Rahmawati, Dea Ramadhan, Muhammad Afif Ramadhani, Muthia Dita Rauhul Rahman Adam Sinaga, Boriski Sinta Dewi Subono, Muhammad Wibbie Wiweka Syarifah, Faranisa Aulia Ar Rahma Tiara Nuriyah Sani Tranggono Tranggono Valentino, Eki Vaundra Cunning Hangesthi Widyarsa, Destiara Nabila Widyawati, Diana Ya Fachrul Rasyid Yustina N Yustina Ngatilah Zella Azzahra Achmadani