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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 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 IIJSE Serambi Engineering
Rr. Rochmoeljati
Department Of Industrial Engineering, Faculty Of Engineering, 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 Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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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%.
STRATEGI PENINGKATAN EFEKTIFITAS KINERJA MANAJEMEN SDM DENGAN PENDEKATAN SWOT DAN AHP DI PT XYZ Pramudya, Kaka Arya; Rochmoeljati, Rr.
JAMBURA: Jurnal Ilmiah Manajemen dan Bisnis Vol 8, No 1 (2025): JIMB - VOLUME 8 NOMOR 1 MEI 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37479/jimb.v8i1.31751

Abstract

Penelitian ini bertujuan untuk merumuskan strategi peningkatan efektivitas kinerja manajemen sumber daya manusia (SDM) di PT XYZ dengan menggunakan pendekatan SWOT (Strengths, Weaknesses, Opportunities, Threats) dan Analytic Hierarchy Process (AHP). Pendekatan SWOT digunakan untuk mengidentifikasi faktor internal dan eksternal yang memengaruhi kinerja manajemen SDM, sedangkan AHP diterapkan untuk memberikan pembobotan pada setiap faktor sehingga strategi yang dirumuskan memiliki dasar prioritas yang terukur. Penelitian ini dilakukan dengan metode pengumpulan data melalui observasi, wawancara, dan kuesioner yang dirancang untuk mengevaluasi tingkat kepentingan masing-masing faktor. Hasil analisis SWOT mengidentifikasi 16 faktor yang memengaruhi kinerja SDM, yang terbagi ke dalam empat kategori, yaitu kekuatan, kelemahan, peluang, dan ancaman. Dengan menggunakan AHP, setiap faktor diberikan bobot prioritas yang memungkinkan perusahaan untuk fokus pada strategi yang paling relevan dan berdampak besar. Berdasarkan hasil pembobotan, penelitian ini merekomendasikan tiga strategi utama. Pertama, peningkatan budaya kerja HEBAT melalui pelatihan berkelanjutan dan sistem penghargaan berbasis kinerja untuk meningkatkan motivasi dan produktivitas karyawan. Kedua, adopsi teknologi baru untuk mengimbangi perkembangan kompetitor sekaligus menciptakan keunggulan kompetitif, termasuk pemanfaatan teknologi digital dalam pengelolaan SDM. Ketiga, penyusunan standar operasional prosedur (SOP) yang jelas dan terintegrasi untuk memperbaiki koordinasi antarbagian dan meningkatkan efisiensi operasional. 
Analysis of Waste in Traffic Services on The Surabaya-Gesik Toll Road for Optimization with Lean Service Method at PT Margabumi Matraraya Sani, Tiara Nuriyah; Rochmoeljati, Rr.
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 2 (2025): Sharia Economics
Publisher : Sharia Economics Department Universitas KH. Abdul Chalim, Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i2.6332

Abstract

PT Margabumi Matraraya is a company engaged in the management and operation of the Surabaya-Gresik toll road. This company is responsible for ensuring that the toll road operations run smoothly in accordance with the established service standards. However, in the toll road traffic service process, inefficiencies are still found, such as long customer waiting times, miscommunication, repeated reporting, inefficient routes, less than optimal workforce performance, and excessive service. This study aims to apply the lean service concept to improve efficiency in the toll road service process and provide recommendations for improvements to reduce waste. The methods used include Value Stream Mapping (VSM), Value Stream Analysis Tools (VALSAT), and Root Cause Analysis (RCA). The results of the analysis using VSM showed that the initial service lead time was 265 minutes with non-value-added activities of 5.96%. After the implementation of the improvement recommendations, non-value-added activities were eliminated, so that the lead time was reduced to 228.2 minutes, or equivalent to a time reduction of 13.89%. The proposed improvement recommendations are optimization of communication systems, application of GPS technology for real-time location monitoring, and improvement of training for officers to maximize human resource potential.
Corrugated Box Production Optimization Using Theory of Constraints (TOC) and DBR - Drum-Buffer-Rope (DBR): Optimasi Produksi Corrugated Box Menggunakan Theory of Constraints (TOC) dan DBR - Drum-Buffer-Rope (DBR) Budiani, Dian Nissa Fitri; Rochmoeljati, Rr
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.1422

Abstract

General Background: Efficient production processes are critical for manufacturing companies to meet output targets and maintain competitiveness. Specific Background: PT XYZ, a corrugated box manufacturer, is experiencing production delays due to bottlenecks at specific workstations. Knowledge Gap: Previous studies have rarely explored the integrated application of the Theory of Constraints (TOC) and Drum Buffer Rope (DBR) methods specifically within the corrugated box industry. Aims: This study aims to identify bottlenecks and propose improvements in PT XYZ’s production process by applying TOC and implementing the DBR scheduling method. Results: Bottlenecks were found at the Converting (SK-2) and Stitching (SK-4) workstations. Through the five focusing steps of TOC and DBR’s structured flow management using drums, buffers, and ropes, along with extended work hours at bottleneck stations, throughput increased from IDR 5,424,572 to IDR 8,040,195—a 32.53% rise. Novelty: This study presents a comprehensive application of TOC and DBR in the corrugated box sector, combining it with linear programming to optimize resource allocation and bottleneck exploitation. Implications: The findings highlight how TOC and DBR can serve as a strategic framework to improve operational efficiency and output in manufacturing systems constrained by limited capacity. Highlights: Converting and Stitching stations identified as production bottlenecks. Overtime at bottlenecks increased throughput by 32.53%. TOC and DBR integration proved effective in streamlining production. Keywords: Drum Buffer Rope, Corrugated Box, Throughput, Bottleneck, Theory of Constraints
Waste Reduction in Fertilizer Manufacturing Through Lean Six Sigma and 5S Implementation Meisufi, Ruro Wiranti; Rochmoeljati, Rr.
Journal La Lifesci Vol. 6 No. 2 (2025): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v6i2.2197

Abstract

This study aims to analyze the waste that occurs in the fertilizer production process at PT XYZ and provide suggestions for improvement with the Lean Six Sigma approach and the 5S method (Seiri, Seiton, Seiso, Seiketsu, Shitsuke). Data was collected through observation, interviews, and questionnaires, then analyzed using the DMAIC stages and tools such as Value Stream Mapping, RCA, and VALSAT. The results showed the three highest wastes were defects, motion, and transportation, with an average DPMO value of 32,706.67 and a sigma level of 3.43. The proposed improvements focused on implementing 5S to increase work efficiency and reduce non-value-added activities. After the improvement, the process efficiency value increased by 6.86%, indicating the effectiveness of the applied method.
Defect Analysis of Pepari Leather Bags Using Fault Tree Analysis and 5W+1H: Analisis Kecacatan Tas Kulit Pepari Leather dengan Fault Tree Analysis dan 5W+1H Pradana, Billy Gandis; Rochmoeljati, Rr.
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.1570

Abstract

General Background: Leather-based products such as bags are highly valued for their aesthetic and durability, yet their production is prone to quality issues. Specific Background: A manufacturing company specializing in leather accessories has consistently encountered product defects, especially in its leather bag line. Knowledge Gap: Despite the importance of maintaining quality in leather goods, there is limited systematic analysis on the root causes of defects using structured diagnostic methods in such contexts.Aims: This study aims to identify and analyze the root causes of leather bag defects using the Fault Tree Analysis (FTA) and 5W+1H methods to propose effective corrective measures. Results: The findings reveal three major defect types: uneven leather texture (0.1018%), scratch marks (0.1577%), and stitching holes (0.1034%). Novelty: The integration of FTA with the 5W+1H framework offers a structured, diagnostic approach rarely applied in small to medium-scale leather production settings. Implications: Recommended improvements include strengthening quality control protocols, enhancing raw material inspection, maintaining equipment reliability, and implementing targeted worker training—providing a comprehensive basis for quality enhancement in leather goods manufacturing. Highlights: Identifies key leather bag defects with precise probability data. Combines FTA and 5W+1H for structured root cause analysis. Proposes actionable improvements to optimize production quality. Keywords: Fault Tree Analysis, Quality Control, Leather Bag, Defect Analysis, Root Cause
Co-Authors Adham Roihan Azriel Irfani Afriza, Ajeng Agustina, Mega Alief Wahyu Pratama Alvionita, Selvi Amalia, Rochmatul Annandita, Alifia Rizky Benedictus Vibriyanto Bagas Prakosa Berliana Dian Novitasari Brilian, Delinda Budiani, Dian Nissa Fitri Bustomy, Andrean Dimas Wandhika D Dira Ernawati Endang Pudji Widjajati Erlina Erlina Faizal, M. Rizki Nur Ferina Indah Lusiana Fibio Isnando Hariatmaja Pradana Fuadah, Layin Imamah, Mardila Nur Iriani Iriani Isna Nugraha Ivonne Rakha Salsabila Kamal Husein Khusnun Nabila 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 Ramadhani, Muthia Dita Rauhul Rahman Adam Sani, Tiara Nuriyah Sinaga, Boriski Subono, Muhammad Wibbie Wiweka Syarifah, Faranisa Aulia Ar Rahma Tranggono Tranggono Vaundra Cunning Hangesthi Widyarsa, Destiara Nabila Widyawati, Diana Ya Fachrul Rasyid Yustina N Yustina Ngatilah Zella Azzahra Achmadani