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Saufik Luthfianto
Jurusan Teknik Industri, Fakultas Teknik, Universitas Pancasakti Tegal
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Analisis Terhadap Lintasan Jalur Kritis Pada Produksi Rubber Keypad dengan Precedence Diagram Method Di PT. XYZ Ewaldo Jales Edinov; Saufik Luthfianto
Journal of Industrial Engineering and Technology Vol. 6 No. 1 (2025): Desember 2025
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study focuses on PT. XYZ, specifically examining critical path analysis in the rubber keypad manufacturing process. The urgency of the issue lies in the importance of understanding and managing the critical path. The study method begins with a field study to collect cycle time data and precedent relationships through direct observation, which are then visualized in an Operational Process Map. Core analysis is performed by determining the critical path using the Precedence Diagram Method (PDM) through manual calculations of time and float parameters. For validation and visualization, the calculation results are compared with simulations using Microsoft Project software. The results of this study showed that 60% of the production process was a critical path with 0 slack, so the company needed intensive supervision because small errors could have a wide impact on other work stations.
IMPLEMENTASI ALAT MONITORING KONTROL SUHU DAN KELEMBAPAN IDEAL DI UPTD METROLOGI LEGAL KOTA TEGAL Saufik Luthfianto; M. Fajar Nurwildani; Siswiyanti; Tofik hidayat; Sandi Satria
Aplikasia: Jurnal Aplikasi Ilmu-ilmu Agama Vol. 25 No. 2 (2025)
Publisher : UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/31yta232

Abstract

Abstract - The service output provided by the UPTD Legal Metrology Office of Tegal City is the assurance of accurate measurement results, which highly depends on the stability of temperature and humidity within the laboratory environment. Uncontrolled fluctuations in these parameters can significantly reduce measurement accuracy and affect public satisfaction and trust as service users. This issue arises because no automatic control system currently regulates the laboratory environment, as temperature and lighting are still adjusted manually by operators, often resulting in unstable and suboptimal conditions. To address this challenge, a community service program was conducted in the field of industrial quality engineering through the implementation of Internet of Things (IoT) technology for automated environmental control. The activity involved direct measurement and variation of several independent variables air conditioner temperature, operating duration, lighting intensity, and human presence to determine the optimal combination that minimizes environmental fluctuation. The developed IoT system automatically regulates AC temperature, fan speed, and lighting intensity based on the standard error fit obtained from the Response Surface Methodology (RSM) model, which defines a K-factors automation as the key control parameter. The system operates adaptively in minute-by-minute loops to maintain optimal temperature and humidity levels while reducing energy consumption by efficiently operating one or two AC units as needed. Through this approach, environmental monitoring and control can be performed wirelessly via smartphones anytime and anywhere, allowing laboratory staff to work more efficiently while maintaining a stable, energy-efficient, and sustainable laboratory environment.   Keyword: Internet of Things (IoT), Legal Metrology, Temperature and Humidity Stability, Response Surface Methodology (RSM), Laboratory Automation.   Abstrak - Output layanan yang dihasilkan oleh UPTD Metrologi Legal Kota Tegal berupa jaminan kebenaran hasil pengukuran sangat bergantung pada kestabilan suhu dan kelembapan ruang laboratorium. Kondisi lingkungan yang tidak ideal atau berfluktuasi secara tidak terkendali dapat menurunkan akurasi pengukuran dan berdampak pada kepuasan serta kepercayaan masyarakat sebagai pengguna layanan. Permasalahan ini muncul karena belum adanya sistem kontrol otomatis terhadap kondisi ruangan, di mana pengaturan suhu dan pencahayaan masih dilakukan secara manual oleh operator. Akibatnya, kondisi ruangan sering kali tidak stabil dan belum mencapai performa optimal. Untuk mengatasi hal tersebut, dilakukan upaya pengabdian masyarakat di bidang rekayasa kualitas industri dengan menerapkan teknologi Internet of Things (IoT) sebagai solusi pengendalian lingkungan berbasis automasi. Kegiatan ini melibatkan proses pengukuran langsung terhadap beberapa variabel bebas, seperti suhu AC, durasi waktu, intensitas cahaya, dan jumlah manusia dalam ruangan. Variabel-variabel tersebut divariasikan untuk memperoleh kondisi optimal yang menghasilkan fluktuasi suhu dan kelembapan paling rendah. Sistem IoT yang dikembangkan dirancang agar dapat mengatur suhu AC, kecepatan kipas, dan intensitas pencahayaan secara otomatis berdasarkan nilai standard error fit dari model Response Surface Methodology (RSM) yang menghasilkan K-factors automation sebagai parameter kendali. Sistem bekerja secara adaptif dengan pengulangan perintah setiap menit untuk mempertahankan kondisi ruangan pada posisi ideal sekaligus menghemat energi listrik dengan menyesuaikan penggunaan satu atau dua unit AC secara efisien. Melalui pendekatan ini, proses pengendalian suhu dan kelembapan dapat dilakukan secara nirkabel melalui smartphone, sehingga meningkatkan kemudahan kerja operator dan memastikan kestabilan lingkungan laboratorium yang lebih presisi, efisien, dan berkelanjutan.   Kata kunci: Internet of Things (IoT), Metrologi Legal, Stabilitas Suhu dan Kelembapan, Response Surface Methodology (RSM), Automasi Laboratorium.
Analisis Pengendalian Kualitas Produk Cushion di PT. X Menggunakan Metode Fuzzy FMEA Revi Apriliyas; Saufik Luthfianto
Tekinfo: Jurnal Ilmiah Teknik Industri dan Informasi Vol 13 No 2 (2025)
Publisher : Program Studi Teknik Industri Universitas Setia Budi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31001/tekinfo.v13i2.2420

Abstract

PT. X is one of the companies engaged in the manufacturing industry, producing rubber part components for use in various manufacturing industries. PT. X records a high number of defective products caused by the suboptimal production processes occurring within the company. One of the products produced at PT. X is the Cushion product, which has become one of the products with the highest number of defects and, of course, causes a deficit for PT. ABC. The purpose of this research is to identify the failure risks occurring in the Cushion product, so that improvements can be made to reduce the defective products generated during the production process. The method often used to help identify the causes of product defects is by using the Fuzzy Failure Mode Effect Analysis (Fuzzy FMEA) method. Fuzzy FMEA has advantages compared to the traditional FMEA method, which allows for a combination and result of RPN values that are less accurate. Based on the FRPN calculation results, the highest value was obtained for the type of failure factor of a broken or abnormal machine, then the repair process was carried out using a repair priority scale that corresponds to the order of failure factors with the highest risk level.
Co-Authors -, Zulfah -, Zulfah Achmad Faizal Afrizal Aimudin Agil Agil Agus Ulin Nuha Al Atsary, Arry Darmawan Alendra Nova Pramana Amanah, Inayatu Amin, Muhammad Ikramulhaq Annisatul Muthoharoh Anthara, , I Made Aryantha Anthara, Made Aryantha Ary Faizal Aryantha A., I Made Aryantha, I Made Asaidi, Ihza Pahlevi Azizah, Fara Putri Budi Prayitno Cipto Sugiono, Mohammad Dani Riyadi Dian Saadah Drajat Samyono Eko Wandiro Ewaldo Jales Edinov Faizal, Ary Fajar Nurwildani Fiyani, Anna Luthfia Galuh Renggani Wilis H, Okky Hendra H3, Royan Hadi Asfuri Hadi Asfuri, Hadi Hani Indri Alisha Hardiyansah, Robi harmiyati, harmiyati Hendra Hermawan , Okky Hidayat, Toffik Hillah, Fatikah Meunasah Husanatur Ridwah, Hidyah Inayatu Amanah Inayatu Amanah Indah Kusumawardani, Indah Indriyani, Intan Irfan Maulana Ramdhoni Irfan Santosa Irfan Santoso Isradias Mirajhusnita I’anatul Maula Khilman, Muhammad Khofifah Nur Faidah Kukuh . Lagiyono . Lailatul Musfiroh Lolyka Dewi Indrasari Lolyka Dewi Indrasari M Fajar Nurwaldini M Fajar Wildan M Haidar Aji Pratama M. Cipto Sugiono M. Fajar Nurwildani M. Fajar Nurwildani Mareta, Happy Indah Maulidya, Navisa mirajhusnita, Isradias Moh Zaynil Mustofa Mohammad Cipto Sugiono Mohammad Cipto Sugiono Mohammad Cipto Sugiono Mohammad Cipto Sugiono Muaropah, Muaropah Muhammad Fajar Nurwildani Muhammad Imron, Muhammad Mustofa, Moh Zaynil Muthoharoh, Annisatul Muzaki, Sansan Agung Muzani, M. Aldi N Nurjanah N Nurjanah, N Nabilatunnuha, Adelia Nanda Sabilah Nisrina Nurkhanifah Nugroho, Adityas Jati Nuha, Agus Ulin Nur Wildani, M. Fajar Nurul Maulida, Nurul Nurwildani , M. Fajar Nurwildani, M Fajar Nurwildani, Mohammad Fajar Okky Hendra Hermawan Oktaviani, Cindra Desi Pangestu, Rifki Panuh, Dedi Karni Puji Astuti pupung juniarto prakoso R.W, Galuh Rafli, Mohamad Ramadhan, Yanuar Syahru Rangga Primadasa Retno, Deddy Purnomo Revi Apriliyas Ridho Ananda Rifki Pangestu Rizki Apri Fauzi Rochim, Mohammad Abdul Rusnoto Rusnoto Rusnoto, R Sabilah, Nanda Sandi Satria Sandy Eka Fananda Saputri, Rita Sidiq, Muhamad Fajar Siswiyanti Siswiyanti Siswiyanti Siswiyanti Siswiyanti Siswiyanti Siswiyanti Siswiyanti Siswiyanti, Siswiyanti Soebyakto . Sokhibi, Akh Sugiono, M. Cipto Sugiono, Mohammad Cipto Suprayogi, Zulfiqar Andhika Suprayogi, Zulfiqar Andhika Sutono, Sugoro Bhakti Suwandono . Tejapramana, Yosafat Ruben Thalita, Tita Tofik Hidayat Tofik Hidayat Tofik Hidayat Triatmaja, Yosea Ulfa, Awaliyah Utami, Miranti Yulinningtyas Wulan Dwi Utami Yudha Adi Kusuma Zulfa ZULFAH Zulfah Zulfah . Zulfah Zulfah