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Economic production quantity model with defective items, imperfect rework process, and lost sales Aprilianti, Chusnul; Garside, Annisa Kesy; Khoidir, Amelia; Saputro, Thomy Eko
Jurnal Sistem dan Manajemen Industri Vol. 8 No. 1 (2024): June
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30656/jsmi.v8i1.7580

Abstract

This study proposes an economic production quantity (EPQ) model that comprehensively addresses scrap items, imperfect quality items, rework processes, and shortages. The model incorporates various types of defective items, including scrap, imperfect quality, and rework able items, and implements immediate rework processes upon the completion of regular production. Shortages are treated as lost sales, enhancing the accuracy of inventory cost estimations. Numerical experiments demonstrate the opti­mal­ity of production lot sizes and underscore the impact of production and demand rate adjustments on overall inventory costs. Sensitivity analysis further elucidates the influence of imperfect quality items on inventory costs. This EPQ model offers a comprehensive approach to efficient and effective finished product inventory management by integrating consider­ations for scrap items, imperfect quality items, and rework processes. Addi­tionally, a furniture manufacturing company case is presented to illustrate the practical application of the proposed model.
LEAN SIX SIGMA APPROACH TO IMPROVE THE PRODUCTION PROCESS IN THE GARMENT COMPANY: A CASE STUDY Fibriani, Lenny; Garside, Annisa Kesy; Amallynda, Ikhlasul
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 11 No. 2 (2023)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2023.011.02.7

Abstract

A company engaged in the garment industry is facing problems that inhibit the production process. These problems comprise an excess of product defects beyond the specified limits, a considerable rate of product returns, delays in product shipment, and disorderly arrangements in storing raw material. This study aims to determine the root causes of problems and provide recommendations for improvement using the concept of lean six sigma. The waste assessment model is used to identify the dominant waste, while the value stream analysis tools is a method used to analyze the causes of the dominant waste. From the research results, four dominant wastes are identified, namely waste defects, unnecessary inventory, waiting and unnecessary motion, with percentages of 27.02%, 15.92%, 14.32% and 14.0% respectively. The results of the analysis using mapping tools show the details of waste in each dominant waste. Proposed recommendations for improvement are made using the failure mode and effect analysis based on the highest risk priority number for each dominant waste. The recommendations proposed by the researchers include implementing a standard operating procedure and work instruction for the sewing process; scheduling machine maintenance using reliability centered maintenance II; planning and scheduling materials using material requirement planning; implementing line balancing; and designing name tags, visual displays, and storage rack layout.
Rancang Bangun Alat Deteksi Cepat Kualitas Air Bersih Berbasis Internet of Things Bachri, Affan; Garside, Annisa Kesy; Junaidi, Mahbub; Laksono, arief Budi; Santoso, Eko Wahyu
KOMPUTEK Vol. 9 No. 2 (2025): Oktober
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/jkt.v9i2.3372

Abstract

Water is one of the primary needs essential for all living beings. In daily life, water is not only used for drinking but also for bathing, washing clothes, irrigating agricultural fields, and various other activities. However, current water resources, both in terms of quantity and quality, are increasingly unable to meet rising demands. The quality of water for daily use has also deteriorated significantly. The increasing annual demand for water is driven by population growth and the fact that almost every human activity requires water. The diversity of human activities has led to rising water pollution, which is one of the major factors contributing to the decline in the availability of clean water. To address this, a device capable of monitoring water quality is proposed. This tool is equipped with turbidity sensors, DS18B20 temperature sensors, and pH sensors, all controlled by an ESP 32 microcontroller and connected via the Internet of Things (IoT). Through this system, real-time water quality monitoring becomes feasible, enabling more optimal and efficient water utilization.
Usulan Peningkatan Efektivitas Mesin Multi Bor dengan Menggunakan Metode Overall Resource Effectiveness dan Failure Mode Effect Analysis Sanjaya, Wahyu Eka Putra; Wardana, Rahmad Wisnu; Sanjaya , Wahyu Eka Putra; Garside, Annisa Kesy; Wardana , Rahmad Wisnu
Jurnal Rekayasa Sistem Industri Vol. 13 No. 1 (2024): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/jrsi.v13i1.6520.69-78

Abstract

PT XYZ is a company engaged in the wood industry which is marketed for export. In carrying out the production process losses often occur in multi drill machines thereby reducing the effectiveness of the machine. These losses arise because the machine is often adjusted and experiences breakdowns. Therefore, this study will analyze the effectiveness of the multi drill machine using the Overall Resource Effectiveness (ORE) method. Furthermore, fishbone diagrams, Failure Mode Effect Analysis (FMEA), and Total Productive Maintenance will be used as a method for providing improvement suggestions to increase machine effectiveness. From the calculation results, the ORE value is 59.58% (below the standard, which is 85%). Furthermore, by using the fishbone and FMEA methods, 3 failure modes with the largest RPN values were taken. Proposed improvements to increase the effectiveness of multi-bore machines are the application of autonomous maintenance, quality maintenance, preventive maintenance, and provision of safety stock.
Identifikasi Air Tanah Berbasis Model Struktur Geologi dengan Metode Geolistrik Darmawan, Azhar Adi; Garside, Annisa Kesy; Setyono, Ernawan; Saleh, Chairil
Jurnal Ilmiah Universitas Batanghari Jambi Vol 25, No 1 (2025): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v25i1.6018

Abstract

The aim of this research is to identify groundwater based on geological structure models using geoelectric methods in Purwosekar Village, Tajinan District, Malang Regency. The technology used in this research is the geoelectric resistivity method which helps identify rock structures and deep groundwater potential. The findings showed that the recommended drilling point was with a discharge of around 5.6 L/sec. At this location there is rock lithology consisting of topsoil, tuff, sandy tuff and lava.
Integration of Lean Six Sigma and Theory of Inventive Problem Solving for Minimizing Waste in Shuttlecock Industry Renggarsari, Rika Risma; Garside, Annisa Kesy; Rosiani, Tyas Yuli; Saputro, Thomy Eko
Jurnal Ilmiah Teknik Industri Vol. 22, No. 2, December 2023
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v22i2.23012

Abstract

In today's competitive business world, organizations are striving to improve their operations and stay ahead. Lean Six Sigma is a popular approach that helps optimize processes and reduce waste. This research focuses on using Lean Six Sigma and TRIZ together to reduce waste in the shuttlecock industry. The study uses a structured process and tools like Value Stream Mapping and Fault Tree Analysis to find and solve waste issues. The results show problems like unnecessary activities, delays, and defects in the production process. Using TRIZ, suggestions for improvements are made based on the analysis. This study shows that combining Lean Six Sigma and TRIZ can effectively reduce waste and improve processes. The findings add to our understanding of using these methods in the shuttlecock industry and offer insights for future research and improvements.
Strengthening MSME Products Through Legal Compliance, Brand Management, and Improved Packaging Design: Penguatan Produk UMKM Melalui Pemenuhan Unsur Legalitas, Manajemen Merek, dan Perbaikan Desain Kemasan Amallynda, Ikhlasul; Lukman, Muhamad; Garside, Annisa Kesy
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 6 (2024): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v8i6.14427

Abstract

The Pengabdian kepada Masyarakat (PkM) program is aimed at MSME business actors who receive assistance from the Malang district PDA, particularly those in the Lawang subdistrict and its surroundings. Currently, business actors are in the pre-startup (8.4%) and startup (32.7%) stages. This means that many small micro businesses have only recently begun or restarted operations following the COVID-19 pandemic. MSME actors face a variety of challenges, including difficulties in competing in the market, unfamiliarity with brand management and e-commerce strategies, a lack of MSME product legality permits, and a lackof good packaging label design. As a result, the opportunity for MSMEs to enter online and offline markets is being overlooked because industrial product quality cannot be separated from brand image and legal permits. The service program includes several activities, including dissemination of industrial product legality and standardization, assistance in submitting permits for the standard legality of industrial products, and assistance in creating product labelsand packaging designs.
PERANCANGAN CYLINDER CATCHPOT VACUUM INFUSION SEBAGAI MEDIA PEMBUAT KOMPOSIT SERAT KARBON Utama, Firman Yasa; Mohammad Irfan; Annisa Kesy Garside; Andita Nataria F.G.; Ferly Isnomo Abdi
Otopro Vol 21 No 1 Nov 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v21n1.p30-37

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The use of metal or steel in a variety of applications has begun to be replaced by Carbon Fiber Reinforced Polymer (CFRP). Some of the advantages of CFRP include mechanical strength almost equal to, and sometimes exceeding, that of metal materials. One innovation in the manufacture of carbon fibre composites is the vacuum infusion method. Resin is drawn into the mould under suction pressure from a vacuum pump. Excess resin is drained from the mould through a hose and collected in a container, which also serves to control the vacuum pressure in the mould before it enters the pump. Previously, the catchpot was made of square-shaped iron with permanently welded joints, resulting in unstable suction pressure. Additionally, the resin's fast curing properties made cleaning difficult, leading to blockages in the hose over time. These issues highlight the need for a vacuum infusion design that is easy to open and close, easy to control and leak-proof. In this study, a research and development (R&D) approach was taken. The design process for the Cylinder Catchpot Vacuum Infusion begins with the design, calculation, and design stages, and ends with functional testing. The design process takes into account dimensions and the motor power required to use ¼HP for a 1-liter catchpot. The component is manufactured through the manufacturing stage and undergoes functional testing, where the Cylinder Catchpot Vacuum Infusion tool detects no leaks in the circuit, ensuring stable pressure, and ensuring proper resin distribution throughout the fibers, ensuring no voids in the composite
Intuitionistic Fuzzy AHP and WASPAS to Assess Service Quality in Online Transportation Annisa Kesy Garside; Rara Putri Ayuning Tyas; Rahmad Wisnu Wardana
Jurnal Optimasi Sistem Industri Vol. 22 No. 1 (2023): Published in May 2023
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (140.03 KB) | DOI: 10.25077/josi.v22.n1.p38-51.2023

Abstract

Indonesia is currently entering a new normal era; this requires people to adapt to the clean-living habit in accordance with health standards in order to carry out normal activities. At the same time, online transportation services have reopened for activity. The service quality provided by online ride-hailing companies (i.e., ojek) such as Gojek, Grab, and Maxim must now consider matters relating to user safety. This study proposes Multi Criteria Decision Making (MCDM) as a method for assessing the service quality of online transportation service providers and uses the Pandemic-SERVQUAL 4.0 model. Pandemi-SERVQUAL 4.0 model adds two new criteria, namely "pandemic" and "industry 4.0". The addition of two new criteria that are more relevant to the current circumstances will increase the accuracy of the research. This study aims to propose the integration of Interval Valued Intuitionistic Fuzzy Analytical Hierarchy Process (IVIF-AHP) to determine the criteria weight and Interval Valued Intuitionistic Fuzzy Weighted Aggregated Sum-Product Assessment (IVIF-WASPAS) to assess the service quality of several online transportation service providers based on the obtained criteria weights. From the results of the service quality assessment using the integration of IVIF-AHP and IVIF-WASPAS, the ranking of online transportation service providers during the new normal era were Grab-car, Go-car, and Maxim-car.
Enhanced Sustainability Assessment Framework for Plywood Manufacturing: A Multi-Method Approach Using Delphi Technique, BWM, and S-VSM Annisa Kesy Garside; Tyas Yuli Rosiani; Adelya Amanda; Thomy Eko Saputro; Eduardo e Oliveira
Jurnal Optimasi Sistem Industri Vol. 23 No. 2 (2024): Published in January 2025 (published late, please read our note)
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (604.955 KB) | DOI: 10.25077/josi.v23.n2.p188-206.2024

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Sustainable manufacturing has emerged as a critical priority in addressing the complex environmental, social, and economic challenges of modern industry. This study focuses on the plywood sector, a significant contributor to manufacturing, which faces distinct sustainability issues such as high energy consumption, material inefficiencies, and hazardous working conditions. To address these challenges, the research introduces workload and noise level as critical indicators for assessing sustainability, broadening the scope of traditional evaluation methods. A multi-method framework was employed, integrating the Delphi technique to identify key sustainability indicators, the Best Worst Method (BWM) to assign weights to these indicators, and Sustainable Value Stream Mapping (S-VSM) paired with a Traffic Light System (TLS) to evaluate and visualize the Manufacturing Sustainability Score (MSS). Applied to a plywood manufacturing case study, the framework highlighted areas requiring improvement, particularly in worker well-being and operational safety, while demonstrating the industry's moderate overall efficiency. By offering actionable insights for improving resource use, operational processes, and employee conditions, this framework provides a practical tool for industry managers aiming to enhance sustainability. Furthermore, its adaptability makes it a valuable reference for other manufacturing sectors seeking to implement resource-efficient and sustainable practices. This research not only fills critical gaps in sustainability assessment but also contributes to advancing industry practices by emphasizing holistic and innovative approaches to manufacturing efficiency.
Co-Authors Adelya Amanda Adhi Nugraha Adhi Nugraha Ahmad Zamawi Ghozali Alfian Alif Amelia Khoidir Andita Nataria F.G. ANDRI SULAKSMI ANDRI SULAKSMI, ANDRI Anindia Karunia Pangesti Aprilianti, Chusnul Azhar Adi Darmawan Bachri, Affan Baiq Nurul Izzah Farida Ramadhani Baiq Nurul Izzah Farida Ramadhani Baya’sud, Faris Cahyanti, Dian Nur Chairil Saleh Chusnul Aprilianti Dana Marsetya Utama Dian Nur Cahyanti Dian Palupi Restuputri Eduardo e Oliveira Ella Dewi Krisnanti Elya Rosiana Ernawan Setyono Fenny Rubbayanti Dewi Ferly Isnomo Abdi Fibriani, Lenny Firman Yasa Utama FITHRIANY HADZIQAH FITHRIANY HADZIQAH, FITHRIANY Fitra Risaldi Fuad Bahrul Ilmi Gigih Amayu Pragastio Hanny Kanavika Rizky Munawar Harto, Setyo Hasyim Yusuf Asjari Hasyim Yusuf Asjari, Hasyim Yusuf Heri Mujayin Kholik Ikhlasul Amallynda Ikhlasul Amalynda Iswanda, Dovian Junaidi, Mahbub Laili, Nabila Rohmatul Laksono, Arief Budi Lapele, Sukmawati Leo Rizki Ardiansyah Lukman, Mohammad Marrica Ahmad Marrica Ahmad Martina Juan Martina Juan, Martina Mohammad Irfan Muhamad Lukman Muhammad Alif Ihsan Muhammad Helmi Kurniawan Munawar, Hanny Kanavika Rizky Nabila Rohmatul Laili Nadia Mardhiyah Nasution, Riven Nyimas Mirnayanti Jayasari Sutadisastra Ode Rapija Gunarimba Waibo Pangesti, Anindia Karunia R. Hadi Wahyuono R. Hadi Wahyuono Rachman, Hamim Rahmad Wisnu Wardana Rara Putri Ayuning Tyas Renggarsari, Rika Risma Riven Nasution Sabrina Legtria Wardani Safitri, Wa Ode Nadhilah Sanjaya , Wahyu Eka Putra Sanjaya, Wahyu Eka Putra Santoso, Eko Wahyu Satya Sudaningtyas Satya Sudaningtyas Selsa Ulfia Siswanti Setyo Harto Shanty Kusuma Dewi Teguh Baroto Thomy Eko Saputro Tiananda Widyarini Tiananda Widyarini Tyas Yuli Rosiani Tyas Yuli Rosiani Wahyu Wicaksono Wardana , Rahmad Wisnu