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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 Briliant: Jurnal Riset dan Konseptual Journal of Industrial Engineering Management EKONOMIS : Journal of Economics and Business Jurnal Sistem Cerdas STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Matrik : Jurnal Manajemen dan Teknik Industri Produksi JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Jurnal Teknika Jurnal Teknik Industri Terintegrasi (JUTIN) Nusantara Science and Technology Proceedings Indonesian Journal of Industrial Engineering & Management Juminten : Jurnal Manajemen Industri dan Teknologi Journal La Lifesci Journal La Multiapp JURNAL ILMIAH GLOBAL EDUCATION Indonesian Journal of Innovation Studies Jurnal Pengbdian Teknik Mesin Golden Ratio of Mapping Idea and Literature Format JAMBURA: JURNAL ILMIAH MANAJEMEN DAN BISNIS Jurnal Sains dan Teknologi Jurnal Teknologi dan Manajemen Industri Terapan Jurnal Teknik Mesin, Industri, Elektro dan Informatika Journal of Creative Student Research Electronic Journal of Education, Social Economics and Technology IIJSE Journal Serambi Engineering (JSE) Jupiter: Publikasi Ilmu Keteknikan Industri, Teknik Elektro dan Informatika Advance Sustainable Science, Engineering and Technology (ASSET) Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Academia Open Jurnal Kendali Teknik dan Sains
Rr. Rochmoeljati
Universitas Pembangunan Nasional Veteran Jawa Timur
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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
ANALISIS RUTE DISTRIBUSI TERPENDEK UNTUK MEMINIMUMKAN BIAYA DISTRIBUSI DENGAN METODE TRAVELLING SALESMAN PROBLEM (TSP) DI PT. XYZ Nugroho, Rosa Novarian Agninditya; Rochmoeljati, Rr.
JISI: Jurnal Integrasi Sistem Industri Vol. 12 No. 2 (2025): JISI UMJ
Publisher : Fakultas teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jisi.12.2.177-186

Abstract

PT. XYZ adalah perusahaan manufaktur yang bergerak di bidang industri produksi kapas dan kasa. Produk PT. XYZ dikenal di seluruh wilayah Indonesia melalui beberapa distributor besar yang tersebar di semua wilayah Indonesia. Maka dari itu, diperlukan lintasan minimum yang tepat agar sistem pendistribusiannya menjadi lebih cepat dan efisien. Masalah yang muncul dalam perusahaan yaitu penentuan rute distribusi yang ditentukan secara manual berlandaskan pemahaman dan pengalaman supir menyebabkan konsumsi bahan bakar melebihi kebutuhan yang seharusnya dan mengakibatkan tingginya biaya distribusi. Tujuan dari penelitian ini adalah menentukan rute distribusi terpendek dan meminimumkan biaya distribusi produk kasa hidrofil steril 16x16 cm dengan menggunakan metode Travelling Salesman Problem (TSP) Algoritma Branch and Bound. Hasil penelitian menunjukkan bahwa metode Traveling Salesman Problem (TSP) Algoritma Branch and Bound lebih baik dan lebih optimal dibandingkan rute awal perusahaan karena dapat menghasilkan usulan perbaikan rute distribusi terpendek dengan penghematan jarak tempuh sebesar 59,4 km dan penghematan biaya distribusi sebesar Rp. 336.600 dengan persentase penghematan jarak tempuh sebesar 16,32% dan persentase penghematan biaya distribusi sebesar 5,74%.
Optimasi Pengendalian Persediaan Bahan Baku Karton Box Menggunakan Multi-Item Economic Order Quantity (EOQ) di PT. XYZ Amalia, Rochmatul; Rochmoeljati, Rr.
JISI: Jurnal Integrasi Sistem Industri Vol. 12 No. 2 (2025): JISI UMJ
Publisher : Fakultas teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jisi.12.2.187-198

Abstract

PT. XYZ adalah perusahaan yang bergerak dibidang manufaktur pembuatan karton kotak bergelombang. Tidak optimalnya frekuensi pembelian bahan baku mengakibatkan tingginya biaya pemesanan. Penelitian ini bertujuan untuk menentukan jumlah optimal persediaan bahan baku dan meminimumkan total biaya persediaan. Berdasarkan hasil penelitian, metode Multi-Item EOQ memperoleh kuantitas pemesanan yang optimal, frekuensi pembelian, biaya pemesanan dan biaya simpan yang optimal. Hal ini dapat dilihat pada kondisi optimal pada PT. XYZ karena dapat menekan frekuensi pembelian dan biaya simpan yang berlebihan. Dengan jumlah pemesanan optimal setiap bahan baku adalah kertas kraft liner 125 GSM sebesar 18 ton, kertas kraft liner 150 GSM sebesar 18 ton, kertas kraft liner 200 GSM sebesar 18 ton, kertas medium 150 GSM sebesar 24 ton, lem sebesar 2337 Kg, Stiching/Kawat sebesar 1056 Kg, Tinta sebesar 2716 Kg. Penggunakan metode EOQ Multi-Item didapatkan total biaya persediaan minimum sebesar Rp. 131.123.896,-.
OPTIMALISASI PENENTUAN RUTE DISTRIBUSI BERAS NASI UDUK MENGGUNAKAN METODE ANT COLONY OPTIMIZATION Farica Raisa Vania; Rr. Rochmoeljati
Jurnal Teknika Vol 17 No 2 (2025): SEPTEMBER
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/jt.v17i2.1382

Abstract

Distribusi modern menghadapi tantangan kompleks akibat cakupan wilayah yang luas, jumlah titik distribusi yang meningkat, dan dinamika permintaan yang berubah. Hal ini menuntut strategi distribusi yang efisien untuk mengoptimalkan rute pengiriman. PT. XYZ menghadapi permasalahan distribusi akibat ketiadaan rute yang terstruktur, sehingga menyebabkan ketidakefisienan waktu tempuh dan biaya operasional. Pengemudi diberikan kebebasan menentukan rute pengiriman tanpa urutan yang jelas, sehingga distribusi produk menjadi kurang optimal. Penelitian ini bertujuan untuk mengoptimalkan rute distribusi produk beras Nasi Uduk 5 kg menggunakan metode Ant Colony Optimization (ACO). Metode ini dipilih karena kemampuannya untuk menghasilkan rute distribusi yang efisien dengan memperhatikan jarak, kapasitas kendaraan, dan pola permintaan. Hasil penelitian menunjukkan bahwa penerapan metode ACO mampu mengurangi jarak tempuh dari 787,5 km menjadi 575,6 km, atau berkurang sebesar 27%. Penurunan jarak ini berdampak langsung pada efisiensi biaya distribusi, yang juga berkurang sebesar 27%. Dengan penerapan metode ini, perusahaan tidak hanya mampu meningkatkan efisiensi operasional tetapi juga mengurangi ketergantungan pada metode konvensional yang kurang fleksibel. Hasil penelitian ini memberikan solusi optimal bagi perusahaan dalam mengatasi tantangan distribusi, serta relevan untuk diterapkan dalam industri dengan kompleksitas distribusi yang tinggi.
Identifikasi Pemborosan Proses Produksi Sepatu Casual dengan Menggunakan Metode Lean Six Sigma di PT. XYZ Fanani, Handre Syahrul; Rr. Rochmoeljati, Rr. Rochmoeljati
BRILIANT: Jurnal Riset dan Konseptual Vol 10 No 3 (2025): Volume 10 Nomor 3, Agustus 2025
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v10i3.1916

Abstract

PT. XYZ is a manufacturing industry in the field of shoe manufacturing. In the production process, waste is still found that results in defects in shoe products. This can be seen in the shoe production process in 2023 as many as 74200 pairs, there are 1372 pairs of defective shoes. This study aims to determine the waste that occurs in the shoe production process, determine the value of sigma, and minimize defects and waste and reduce activities that do not provide added value. This study used the lean six sigma method. The study began by identifying the waste that occurs in the shoe production process with the most dominant waste, namely defects. The level of sigma capability obtained in the shoe production process at PT. XYZ is 4.10 with a DPMO value of 4646 in the good category for the Indonesian Industry average. Furthermore, analysis was carried out to identify the cause of defects with fishbone diagrams. Proposed improvements using the Failure Mode and Effect Analysis (FMEA) tool. With the design of process activity mapping (PAM) and big picture mapping, lead time can be reduced from 1060.43 minutes to 1000.30 minutes.
Analisis Pengendalian Kualitas Produk Infusion Stand Menggunakan Metode New Seven Tools dan Failure Mode and Effects Analysis (FMEA) di PT XYZ Widyawati, Diana; Rochmoeljati, Rr.; Nugraha, Isna
Ekonomis: Journal of Economics and Business Vol 9, No 2 (2025): September
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/ekonomis.v9i2.2012

Abstract

This study aims to determine the factors that influence the quality of infusion stand products at PT. XYZ. The research method used in this study is the New Seven Tools method and Failure Mode and Effects Analysis (FMEA). The data collection technique uses interview and observation methods. Based on the results of the study, it is known that the factors that influence defects in infusion stand products are based on human factors, material factors, machine factors, method factors, and environmental factors. It is also known that defects with the highest Risk Priority Number value which will be a priority for repair are broken wheel defects with an RPN value of 280.
Analysis of Yarn Materials Defects in the Warping Process using Fault Tree Analysis with Improvement Proposals 5W1H Based on the 5W1H Method Rafida, Halimas Nafi; Rochmoeljati, Rochmoeljati
Journal La Multiapp Vol. 6 No. 5 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i5.2211

Abstract

Quality control is a critical aspect of the textile industry, essential for maintaining product consistency. However, defects in yarn materials continue to persist, particularly during the warping process. This study investigates yarn defects at PT X using the Fault Tree Analysis (FTA) method, identifying 15 root causes and proposing corrective measures based on the 5W1H approach. The research specifically addresses defects in Tetoron Rayon (TR) yarn Ne 30, with a focus on Cross Defects, Defective Rolls, and Nglokor Rolls. The FTA method offers a structured approach to failure analysis, while the 5W1H method is employed to derive strategic corrective actions. The findings demonstrate that the probability of defect occurrence varies between the Direct and Sectional Warping processes. Cross Defects occur with probabilities of 0.1333% and 0.126%, Defective Rolls with probabilities of 0.159% and 0.243%, and Nglokor Rolls with probabilities of 1% and 0.171%, respectively. The analysis identifies 15 primary root causes contributing to these defects, which include machine-related failures, human error, and material inconsistencies. Based on these findings, the study recommends the implementation of preventive maintenance schedules, operator training programs, and a more rigorous adherence to standard operating procedures (SOPs). The proposed improvements are expected to optimize the warping process and enhance the overall quality of the product.
Optimizing Paving Block Parameters with Taguchi Method for Higher Compressive Strength: Optimasi Parameter Bata Paving Menggunakan Metode Taguchi untuk Meningkatkan Kekuatan Tekanan Syarifah, Faranisa Aulia Ar Rahma; 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.v26i4.1594

Abstract

General background: The growing demand for high-quality paving blocks in Indonesia requires manufacturers to consistently meet SNI standards, particularly in compressive strength, as it determines durability and safety. Specific background: At PT. XYZ, production inconsistencies often lead to cracks during testing, highlighting variability in process parameters. Knowledge gap: Although the Taguchi method has been widely applied in manufacturing quality improvement, its systematic integration with multiple critical parameters in paving block production remains underexplored. Aim: This study seeks to optimize compressive strength by applying the Taguchi Design of Experiments with an L₉ orthogonal array, focusing on cement–sand ratio, fly ash content, and aggregate size. Results: Signal-to-Noise Ratio and ANOVA analyses revealed that cement–sand ratio is the most influential factor, followed by fly ash and aggregate type, with the optimal combination of 3:5 cement–sand ratio, 3% fly ash, and medium aggregate (5–10 mm), producing a compressive strength of 42.16 MPa—exceeding the SNI minimum of 40 MPa. Novelty: This research introduces a robust model that integrates Taguchi and ANOVA to validate optimal production parameters specifically for paving block manufacturing. Implications: The findings provide practical guidelines for improving product consistency, reducing defects, and supporting cost-effective quality engineering in the paving block industry. Highlights: Taguchi design identified optimal cement–sand ratio, fly ash, and aggregate size. Optimal parameters achieved 42.16 MPa, exceeding SNI standards. Integration of Taguchi and ANOVA ensures consistent, cost-effective quality control. Keywords: Paving Block, Compressive Strength, Taguchi Method, ANOVA, Quality Engineering
Quality Control of Shoe Products Using the New Seven Tools Method and Root Cause Analysis Fuadah, Layin; Rochmoeljati, Rr.
Journal La Multiapp Vol. 6 No. 5 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i5.2226

Abstract

This study aims to analyze and control product defects in shoes produced by PT XYZ using the New Seven Tools method and Root Cause Analysis (RCA). The research method applied is descriptive with both qualitative and quantitative approaches. Primary data were obtained through observations and interviews, while secondary data consisted of production documents and defect records collected from June 2024 to January 2025. The analysis results show that defect rates exceeded the company’s standard threshold (2%), particularly in the sewing and lasting processes. By utilizing tools such as the Affinity Diagram, P-Chart, Tree Diagram, Matrix Diagram, and Process Decision Program Chart (PDPC), the study identified that the main contributing factors to defects stemmed from human, method, machine, material, and environmental aspects. RCA revealed that the root causes included insufficient training, non-compliance with standard operating procedures (SOP), suboptimal equipment, and unergonomic working conditions. The study proposed 33 improvement actions, of which 28 were deemed feasible for implementation. These findings are expected to help reduce the number of defective products and improve overall production quality.
Analisis Tingkat Pemborosan Lean Warehousing dengan Metode Value Stream Mapping dan FMEA di Warehouse Penyimpanan PT.XYZ Sinaga, Boriski; Rochmoeljati, Rr.
Ekonomis: Journal of Economics and Business Vol 9, No 2 (2025): September
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/ekonomis.v9i2.2013

Abstract

This study aims to determine the level of waste that occurs in the warehousing process at PT. XYZ through the implementation of lean warehousing. Data analysis in this study uses the lean warehousing method, namely Value Stream Mapping (VSM) to find critical waste in the warehousing process using the Waste Assessment Model (WAM) which then identifies the root causes of waste using a fishbone diagram and analyzes improvement recommendations using the FMEA method. Based on the results of the study, it is known that the levels of critical waste from the highest to the lowest, respectively, are waste waiting, waste unnecessary motion, waste over-processing, and waste defect. Based on the fishbone diagram analysis, there are 6 factors that cause the four critical wastes, namely human factors, method, material, environment, measurement, and machine. The proposed improvements that are the result of the analysis using FMEA are implementing the 5S concept in the warehouse, implementing a FIFO system for placing goods in the warehouse, increasing the number of workers, optimizing employee placement, and implementing a warehouse management system.
Co-Authors Adham Roihan Azriel Irfani Afriza, Ajeng Agustina, Mega Alfan Afiyudin Alief Wahyu Pratama Alvionita, Selvi Amalia, Rochmatul Amelia, Avril Firda Annandita, Alifia Rizky Benedictus V.B.P. Benedictus Vibriyanto Bagas Prakosa Berliana D. Novitasari Berliana Dian Novitasari Brilian, Delinda Budiani, Dian Nissa Fitri Bustomy, Andrean Cantika, Devani Nendi Aurillia Chori Dwi Azizah Christabela Jesselyn Citra Wahyuning Dama Yanti, Alviani Dewi Aisarunnisa' Maunah Dimas Wandhika D Dira Ernawati Endang Pudji Widjajati Erlangga, Muhammad Daffa Erlina Erlina Fadilla Umeida Putri Faishal Hidayatulloh Faizal, M. Rizki Nur Fanani, Handre Syahrul Farica Raisa Vania Faris R, Mohamad Fatharisa Ingke Maulida Fatihul F, Ahmad Fenny Novianti Ferina Indah Lusiana Ferina Indah Lusiana Ferraldo Kusuma Artono Putra Ferraldo Kusuma Artono Putra Fibio Isnando Hariatmaja Pradana Fibio Isnando Hariatmaja Pradana Fitria Novi Ariestiyani Fuadah, Layin Ike Jihan Nabila Iriani Iriani Isna Nugraha Isna Nugraha Ivonne Rakha Salsabila Ivonne Rakha Salsabila Kamal Husein Kamal Husein Kezia Grace Sudarman Khusnun Nabila Khusnun Nabila Layin Fuadah Marcella, Sania Mardila Nur Imamah Marisa Tri Indra Nayu Aini Kurnila Marsya Laila Ahyaliya Maunah, Dewi Aisarunnisa' Meisufi, Ruro Wiranti Moch Taufik Hidayat Moch Taufik Hidayat Mochamad Ismail Zakaria Mochamad Ismail Zakaria Muhammad Hadziqul Afkar Muhammad Ilham Romadoni Muhammad Ricky Suryawan Muhammad Rizki Kurniawan Muhammad Zainur Roziqin Mutia Meilanda Nababan, Yohanes Nafa Artha Cahaya Mulia Nafa Artha Cahaya Mulia Nafa Artha Cahaya Mulia Nugraha, Isna Nugroho, Rosa Novarian Agninditya Pradana, Billy Gandis Prakosa, Albertus Adriyanto Satrio Pramudya, Kaka Arya Prasetyo Mukti Prasetyo Mukti Pratama, Alief Wahyu Primadhiya, Fairuzzayyan Pristyanto, Yafie Putra, M. Rizqy Ifaldhi Qanita Zahira Muhar Arifin Qothrunnada, Alisa R. A. Luthfi Asia Fergisya Raditya Dwi Firmansyah Raditya Y E Rafida, Halimas Nafi Rahandi Ramadhan Rahmadianto, Raihan Rahmawati, Dea Ramadhan, Muhammad Afif Ramadhani, Muthia Dita Rauhul Rahman Adam Rebeka P, Adhe Ridwan Alief Ramdhan Adi Ruro Wiranti Meisufi Sastya, Nur Cholifah Shafa, Aura Diva sholeha, fitriatus Sinaga, Boriski Sinta Dewi Sofia Fitri Anasari Sofia Fitri Anasari Subono, Muhammad Wibbie Wiweka Sumiati Sumiati Surya M Ramadhan Syarifah, Faranisa Aulia Ar Rahma Tiara Nuriyah Sani Tivani Nava Arier Tranggono Tranggono Valentino, Eki Vaundra Cunning Hangesthi Vaundra Cunning Hangesthi Widyarsa, Destiara Nabila Widyawati, Diana Windra R, Harys Wisnu Wardana, Wisnu Ya Fachrul Rasyid Ya Fachrul Rasyid Yustina N Yustina Ngatilah Zella Azzahra Achmadani