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Tedjo Sukmono
Program Studi Teknik Industri Universitas Muhammadiyah Sidoarjo
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Journal : ijot

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Implementation of Nawaz, Enscore, and Ham (NEH) for Minimize Makespan in Job Shop Scheduling Adistyas Nastiti, Octavia; Sukmono, Tedjo
International Journal on Orange Technologies Vol. 7 No. 2 (2025): International Journal on Orange Technologies (IJOT)
Publisher : Research Parks Publishing LLC

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31149/ijot.v7i2.5438

Abstract

OPQ is a company that specializes in providing construction materials such as ready-mix concrete, precast concrete, concrete bricks and crushed stone. With 4 different compositions and high demand, it is not uncommon for problems to occur, namely late delivery. This research aims to increase work efficiency by minimizing makespan to reduce idle time which will impact delays in product delivery to customers. The results of production scheduling using the NEH method produce smaller makespan results and faster production process completion times compared to the scheduling method used by the company. The NEH method produces a makespan of 2.29 with the job sequence P3-P4-P2-P1. The method used by the company obtained a makespan of 3.01 with a partial work sequence of P2-P3-P4-P1. This can prove that the calculation results using the NEH method can minimize makespan and this method can be used by companies as a reference for scheduling the production process to overcome the problems being faced by the company.
Tractor Paint Quality Control By Integrating The Six Sigma Method And Fail Mode And Effect Analysis (FMEA) PT. XYZ Wahyu Setiawan, Ardhi; Sulistiyowati, Wiwik; Bamban Jakaria, Ribangun; Sukmono, Tedjo
International Journal on Orange Technologies Vol. 7 No. 3 (2025): International Journal on Orange Technologies (IJOT)
Publisher : Research Parks Publishing LLC

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31149/ijot.v7i3.5439

Abstract

XYZ is a company engaged in assembling agricultural machinery, namely four-wheeled tractors. The components of the four-wheeled tractor itself consist of the front wheels, rear wheels, engine, engine cover, chassis/frame, steering floor, steering seat, fenders, pedals and roof. For parts that will be assembled, the painting process is carried out within the company itself. Therefore, during the painting process, several problems arise, namely differences in color, paint thickness and paint strength. The painting process at this company has not yet reached zero defects, because several defects were still found in the fenders, floor (steering floor), and engine cover. Situations like this can result in increased production costs and decreased product quality, which ultimately reduces profitability. The aim of this research is to find out the main factors that cause defects in painting parts and make appropriate suggestions/improvements to reduce and prevent defects in the painting process. The method used is the Six Sigma method and the FMEA (Failure Mode Effect and Analysis) method. Six Sigma in technical methods is oriented towards a statistical approach to calculating product defects. The goal is to reduce process variance by eliminating defects that interfere with customer satisfaction. FMEA is a technical analysis which, if carried out correctly and at the right time, will provide great value in helping the decision making process. The research results show that the average DPMO value for tractor product production on weekdays from January 1 2023 to April 30 2023 is 107618.46 with an average sigma value of 2.74. The recommendation for improvement from the FMEA method is that the cause of the defect with the highest RPN value is painting that does not comply with the SOP of 576. The proposed improvement for the cause of this defect is supervision of painting employees.
Co-Authors Abdul Rohman Abdul Rohman Adistyas Nastiti, Octavia Afreni Hamidah Agung Laksono Agus Subagyo Ahmad Fikri Ardianto Ahmad Sazali Alfian Fajar Gunawan Ali Mashar Ali Sadikin Ali Sadikin Amatullah, Dhiny Angela, Fitrah Cornellya Apriliana Sari Wulandari, Indah Arba, Risqi Mutia Ardiansyah Eko Saputra Arifin , Zainul Arinda Jayanti Putri Askhaarina Aulia Tsalits Asni Johari Asrial Asrial Atika, Dewi Nur Atikha Sidhi Cahyana Azhari, Asri Azlinda Anggraini Putri Bambang Hariyadi Bambang Hariyadi Bambang Hariyadi Bambang Haryadi Benedika Ferdian Hutabarat Bestia Dewi Boy Isma Putra Damayanti , Maharani Lutfiah Damris Muhammad Dani Sartika Darlim Darmawi Dawam Suprayogi Desfaur Natalia Dewi Nurus Silmi Dian Ratna Sari Didin Muhjidin Diwanti Faradiba, Nabila Dristiana, Fila Dwi Kakung Saputro Dyah Ayu Shinta Permatasary Dzati Fauziyah Ema Marminto Ervan Johan Wicaksana Erwin Widiantono Fahrell Andhika Pratama Fajar Ardian Cahyo Putra Febrina Rolin Fila Dristiana Gusti Nurina Azhariani Hafizah, Mutia Hana Catur Wahyuni Harlis Harlis Harlis Harlis Hartanti, Lusia Permata Sari Hasnaul Maritsa Heni Asmora Ritonga Hery Murnawan, Hery Hutwan Syarifuddin Ihsan, Mahya Indra Lesmana Inggit Marodiyah Jamaaluddin Jamaluddin Jamaluddin Kania Fatikasari Khairatinisa Khairatinisa Krisna Risky Putra Irawan Lega Anattri Leksono, Rudy Bowo Lestari, Wiwik Puji Lindyawati, Lely M. F. Rahardjo M. Rusdi M.Haris Efendi Hsb Mardhotillah, Bunga Mauli, Fajar Dwi May Sella Meirani Id’ha Khusainiah Mishani, Adinda Chamilia Mochammad Amru Nail Suherman Mochammad Imam Mashuri Mohammad Andi Rasyid Mohammad Buchori Mohammad Ekki Hadian Mohammad Nabil Makarim Much Syafiudin Muhaimin Muhaimin Muhammad Arizki Zainul Ramadhan Muhammad Dio Dwi Septian Muhammad Erick Sanjaya Muhammad Hafid Fikrianto Muhammad Haris Effendi Hsb Mukhammad Rifky Ramadhan Mukhammad Surya Lesmana Muswita Muswita Muswita Muswita Nafis Khumaidah Natalia, Desfaur Naufalut Tharif Qurniawan Naufalut Tharif Qurniawan Nazifa, Boti Iffa Nisrina Salsabila Novi Prastyanda Putra Pratama Novi Ramayani Nugraha, A. Prima Nugroho, Dizsa Arliansyah Nur Dwi Kesya Aprisilia NURJIRANA NURJIRANA Nurma M. Hidayatulloh Octavia Adistyas Nastiti Octavia Adistyas Nastiti Pangestu, Retno PRADITA EKO PRASETYO UTOMO Putra, Tri Syukria Putri Ramadhani Putri, Andini Faizatul Putri, Melinda Aprilia R. Dwi Hadidjaja Rasjid Saputra Rachman, Meisya Azzahra Radiana Atika Sari Rahmansyah, Muhammad Miftah Arzaq Rany Riyantati, Dena Rasyid, Mohammad Andi Rayandra Asyhar Revis Asra Revis Asra Revis Asra Ribangun Bamban Jakaria Rifli Rindes Riska Afrilia Rista Dwi Cahyaningurm Rizky Janatul Magwa Rudy Bowo Leksono Safitri , Salsa Zulfa SANDI KURNIAWAN Sanjaya, Muhammad Erick Saputra, Nur Qomaruddin Sari , Indah Apriliana Sari W, Indah Apriliana Sari Wulandari, Indah Apriliana Sarwo Edy Wibowo Setiawan, Ardhi Wahyu Setiawan, Ari Rio De Sigit Wahono sisiliani, fitria trisna Sofillauny, Zahara Sonia Angellina Saputri Suhadak Sulistiono Suzanti, Sriliah Syaiful Syaiful Syaifullah, Dikril Ilham TARUNI SRI PRAWAST MIEN KAOMINI ANY ARYANI DEDY DURYADI SOLIHIN Tedy Azmi Nasution TEJA KASWARI Tia Wulandari TIA WULANDARI Tri Afiyani Tri Syukria Putra Ucop Haroen Upik Yelianti Utomo, Pradita Eko Prasetyo Vanisa Reyhan Faradiba Varid Jainuri Vivin Nur Oktavianty Wahono, Sigit Wahyu Nugroho Wahyu Setiawan, Ardhi Wardhani, Devira Kusuma Wijatmiko, Erie Fadma Noer Fitriana Wilda Syahri Winda Dwi Kartika, Winda Dwi Wiwik Sulistiyowati Wulandari, Indah Apriliana Sari Yoppie Wulanda Yusuf Effri Prastyo Budi Zurweni Zurweni