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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 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,-.
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.
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.
Quality Control Analysis of Sugar Production Process with FTA and FMEA Methods in PT XYZ Imamah, Mardila Nur; Rochmoeljati, Rr.
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (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.v8i3.6610

Abstract

One of the sugar factories built by the Indonesian state as an effort to revitalize the national sugar industry through the use of modern technology is PT XYZ. However, this sugar factory is experiencing problems with the results of testing the production of white crystal sugar which has defects that are not in accordance with the quality requirements of white crystal sugar with SNI number 3140-3: 2020. Defects that occur include defects in sugar moisture content, sugar solution color, grain size, and sugar crystal uniformity. This study was conducted to determine the factors that can affect the occurrence of defects in the white crystal sugar production process at PT XYZ and how the proposed improvements can be implemented to control the quality of white crystal sugar products at PT XYZ. The methods used in this research are the Fault Tree Analysis (FTA) and Failure Mode and Effects Analysis (FMEA) methods. Based on calculations using the Fault Tree Analysis method, the calculated probability results for each type of defect, namely large grain defects, moisture content, color, and sugar crystal uniformity, are 0.000657%, 0.000889%, 0.001597%, and 0.000662%, respectively. The FMEA method obtained a large grain type defect with the highest RPN value of 120 (High). Large grain type defects cause white crystal sugar to not conform to market specifications and dissolve more slowly. In the second rank, there is a defect in water content with an RPN value of 112 (medium). Quality control should be carried out regularly and continuously so that it can be a reference for continuous improvement in the future.
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.
High User Satisfaction and Improvement Priorities in Wondr by Bank Negara Indonesia: Kepuasan Pengguna yang Tinggi dan Prioritas Peningkatan di Wondr oleh Bank Negara Indonesia Maunah, Dewi Aisarunnisa'; Rochmoeljati, Rr.
Academia Open Vol. 10 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.10.2025.12253

Abstract

General Background: The rapid advancement of digital technology has transformed the banking industry, leading to the development of mobile banking applications that emphasize user experience and satisfaction. Specific Background: Bank Negara Indonesia (BNI) introduced the Wondr by BNI application as an enhancement to its previous mobile banking service, offering a more integrated financial ecosystem. However, its relatively low user rating compared to its predecessor indicates potential service quality issues. Knowledge Gap: Previous studies have rarely integrated Google’s HEART Metrics and Importance Performance Analysis (IPA) to holistically assess mobile banking user experience. Aims: This study aims to evaluate user satisfaction with Wondr by BNI using HEART Metrics—covering Happiness, Engagement, Adoption, Retention, and Task Success—combined with IPA to identify improvement priorities. Results: The findings reveal that overall satisfaction levels are high, with Happiness, Adoption, and Retention exceeding the 80% usability target, while Engagement and Task Success require improvement. Most attributes fall into the “Maintain Performance” quadrant, though several aspects such as responsiveness and notification reliability remain suboptimal. Novelty: This research uniquely applies a dual-method framework to uncover both experiential and performance-based gaps in mobile banking services. Implications: The results provide strategic insights for optimizing user experience and guiding continuous digital service innovation in Indonesia’s banking sector. Highlights: Combines HEART Metrics and IPA for comprehensive UX evaluation. Identifies key improvement areas in engagement and task success. Provides strategic guidance for enhancing digital banking services. Keywords: HEART Metrics, Importance Performance Analysis, User Satisfaction, Mobile Banking, Wondr by BNI
Waste Analysis Of Pasted Woven Production Process Using Lean Six Sigma Method Agustina, Mega; Rochmoeljati, Rr.
Rekayasa Vol 17, No 2: Agustus, 2024
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v17i2.25646

Abstract

This research was conducted in a company engaged in the production of cement bags which include pasted woven, pasted kraft, and sewn woven. Waste is still generated on the production floor throughout the pasted weaved manufacturing process. The essential waste that happens, including faults, waiting, Environmental, Health, and Safety, as well as other problems that cause the lead time to be too lengthy, namely 1430 minutes. The goal of this study is to assess the degree of waste that happens by calculating Defects Per Million Opportunities and the sigma level, as well as to make recommendations for improvement. The research results show that the reduction in lead time for waste of non-value-added defects in the pasted woven production process, which was originally worth 1430 minutes, can be reduced to 1365 minutes by reducing activities in the form of a 65-minute delay, thereby reducing cycle time in the pasted woven production process. The average DPMO value was 36898 at a sigma level of 3.284. Proposed modifications to decrease waste are analyzed using Failure Mode and Effect Analysis and Risk Priority Number values to identify the sources of waste. Recommendations for companies provide training to operators to avoid human error, inspect raw materials before entering the production process and periodically control the condition of machines.
Analisis Kualitas Defect Produk Pupuk Dolomit dengan Metode New Seven Tools dan Failure Mode and Effect Analysis (FMEA) di PT. XYZ Prakosa, Albertus Adriyanto Satrio; Rochmoeljati, Rr.; Nugraha, Isna
Tekmapro Vol. 19 No. 2 (2024): TEKMAPRO
Publisher : Program Studi Teknik Industri Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/tekmapro.v19i2.414

Abstract

PT. XYZ merupakan perusahaan yang bergerak dalam industri pupuk dan bahan tambang dolomit. Standar mutu komposisi hara yang terdapat pada pupuk yang dimiliki oleh PT. XYZ antara lain kadar magnesium oksida (MgO) sebesar 18-22%, kadar kalsium oksida (CaO) sebesar 29-30%, kadar air (H2O) <1%, kehalusan (mesh 100) lolos 95%. Permasalahan yang masih sering terjadi di PT. XYZ adalah pupuk yang dihasilkan tidak sesuai dengan standar yang telah ditentukan. Penelitian ini bertujuan untuk mengetahui faktor-faktor penyebab kecacatan serta usulan perbaikan yang dapat dilakukan untuk mengurangi defect. New Seven Tools merupakan alat-alat bantu yang digunakan dalam eksplorasi kualitatif meliputi beberapa tahapan yaitu Affinity Diagram, Interrelationship Diagram, Tree Diagram, Matrix Diagram, Matrix Data Analysis, Activity Network Diagram, dan Process Decision Program Chart (PDPC). Failure Mode and Effect Analysis (FMEA) adalah suatu prosedur terstruktur untuk mengidentifikasi dan mencegah sebanyak mungkin mode kegagalan (failure mode) dengan menghitung Risk Priority Number (Severity x Occurrance x Detection). Berdasarkan hasil penelitian dapat diketahui faktor-faktor yang menjadi penyebab kecacatan antara lain faktor manusia, material, metode, mesin, dan lingkungan, serta diketahui kecacatan kehalusan dengan nilai Risk Priority Number (RPN) tertinggi yakni 567 yang berarti menjadi prioritas untuk dilakukan usulan perbaikan.
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