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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Journal of Engineering and Management in Industrial System Journal of Environmental Engineering and Sustainable Technology Journal of Energy, Mechanical, Material and Manufacturing Engineering Pilar Teknologi : Jurnal Penelitian Ilmu-ilmu Teknik International Journal of Mechanical Engineering Technologies and Applications (MECHTA) GMPI Conference Series
Yudy Surya Irawan
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Physics Social Sciences

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PENGEMBANGAN METODE LEAN MANUFACTURE UNTUK INVESTIGASI PROSES PRODUKSI HC (HARD COVER) FOLIO DENGAN MENGGUNAKAN VALUE STREAM MAPPING Muharom, Muharom; Soeparman, Sudjito; Irawan, Yudy Surya
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 1 No. 1 (2013)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jemis.2013.001.01.8

Abstract

A paper company produces many kind of papers where notebooks are its main products. The production approach is make to order. At the completion of the production processes indicates delays due to long lead times. Long lead time of production reduces the company's flexibility and speed of response to customers. The company should shorten the lead time. Shortening lead time, the speed customer response will be faster, the productivity will be increasing and utilization of production resources will more effective. This study propose the use of Value Stream Mapping (VSM) method to overcome it. VSM will identify wastes that can be eliminated, so the company can reduce production costs, meet customer demand, and also increase the company's revenue and market share. The observation identifies wastes in the HC Folio production processes, such as waiting, transportation and unnecessary inventory. Based on the significant wastes, it proposes some improvements to repair the transportation and waiting wastes. To handle work in process parts, the study recommends to implement of rails and trains. It will reduce production time that decreases from 66,828 hours 49 minutes 48 seconds to 30,938 hour 56 minutes 24 seconds.
Effect of High Concentration Alkali Treatment on the Mechanical and Structural Properties of Doyo Fibers (Curculigo Latifolia) Setiawan, Ferry Bayu; Setyarini, Putu Hadi; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol. 17 No. 1 (2026)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v17i1.2321

Abstract

The growing demand for sustainable materials has increased interest in natural fibers as eco-friendly reinforcements. Doyo fiber (Curculigo latifolia) from East Kalimantan remains insufficiently characterized despite its ecological potential. This study investigates the effect of alkali treatment concentration and immersion time on the mechanical and structural properties of doyo fibers. Fibers were treated using NaOH solutions (5–10%) and analyzed through tensile testing, Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM). Untreated fibers exhibited the highest tensile strength (176.83 MPa), while moderate treatment (5% NaOH for 90 min) preserved comparable strength (171.52 MPa) with improved surface activation. Aggressive treatment (10% NaOH) reduced tensile strength below 110 MPa due to cellulose degradation. These results demonstrate that alkali treatment requires careful optimization to balance performance enhancement and structural integrity.
Co-Authors Abdulla, Farg Abdulla M Achmad As’ad Sonief Achmad Noerkhaerin Putra Agung Sugeng Widodo Alfeus Sunarso Amiruddin, Muhammad Agung Anindito Purnowidodo Arief, Saifullah Dagus Resmana Djuanda Darmadi, Djarot Bangun Devi Andriani Dian Fitria Agus Aristiyono Dicky Adi Tyagita Djarot B. Darmadi, Djarot B. Djuanda, Dagus Resmana Dwi Prasetyo Eko Budi Santoso Eko Hendry Suyono Endi Sutikno Fauzi, Katanda Fajar Helmy Mukti Himawan Helmy Mukti Himawan, Helmy Mukti Heru Suryanto Hidayati, Nafisah Arina I Nyoman Gede Wardana Ihsan, Muhammad Alif Imam Kusyairi Imam Kusyairi, Imam Ishardita Pambudi Tama Jatmiko Awali Jatmoko Awali Josef Matheus Jufra Daud Johanis Abanat Kris Witono Kustriyanto, Eddy Kustriyanto, Eddy Moch. Agus Choiron Moch. Agus Choiron Mochammad Hannats Hanafi Ichsan, Mochammad Hannats Muharom Muharom Muharom Muharom Murti Astuti Musyaffa, Dzikri Amali Nadya, Mesti Nanse Henny Pattiasina Pah, Jack Carol Adolf Pambuditama, Ishardita Pratikto Pratikto Pungky Eka Setyawan Putu Hadi Setyarini Rachmat Safari Roesiana Dewi, Aisshah Rudy Soenoko Rudy Soenoko Rudy Soenoko Safari, Rachmat Sanjiwani, Yudistira Setiawan, Ferry Bayu Sri Mulyo Bondan Respati Sudjito Soeparman Sutrisno Sutrisno Sutrisno, Sutrisno Taryono, Taryono Teguh Dwi Widodo Tjuk Oerbandono Venusa Abriandika Wahyono Suprapto Wakhidah, Delia Hani Widha Kusumaningdyah Yeni Sumantri