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Nur Fitria Pujo Leksonowati
Politeknik Negeri Batam
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Journal : journal of applied mechanical technology jamet

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Studi Kasus Penjadwalan Proyek: Frame Acid Skid dengan Gant Chart dan Critical Path Method Pujo Leksonowati, Nur Fitria; Pamungkas, Nurman; Stefani, Windy; Purba, Adi Syahputra; Manurung, Meilani Mandhalena; Batubara, Ninda Hardina; Gunawan, Leo Van
Journal of Applied Mechanical Technology Vol 3 No 1 (2024): Journal of Applied Mechanical Technology (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v3i1.53

Abstract

This study examines the scheduling of the Frame Acid Skid project at the Lombok Steam Power Plant (PLTU) using Gantt Chart and Critical Path Method (CPM). The primary objective is to identify the causes of delays and propose optimization measures for the project duration. Data collected indicates a significant difference between the planned duration (24 days) and the actual project completion time (47 days). The main delays occurred in the welding and painting phases, each requiring an additional 13 days. Contributing factors include the addition of a welding process for materials not covered in the initial contract and specification mismatches in the painting phase. Analysis with Gantt Chart and CPM reveals that enhanced communication, more detailed initial planning, and strict monitoring of project specifications are crucial to minimize the impact of delays on cost and time. The results of this study provide a strong basis for decision-making in similar future projects.
​​Pengaruh G96 dan G97 terhadap Kekasaran Permukaan ST 37 dan S45C pada Pembubutan CNC​ pujo leksonowati, nur fitria; Pamungkas, Nurman; Baharudin, Budi; Cahyagi, Danang; Van Gunawan, Leo; Adimas, Adimas
Journal of Applied Mechanical Technology Vol 4 No 1 (2025): JOURNAL OF APPLIED MECHANICAL TECHNOLOGY (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v4i1.308

Abstract

ABSTRACT – This study aims to compare the effects of Constant Cutting Speed (G96) and Constant Spindle Speed (G97) modes on the surface roughness of ST 37 and S45C materials in step-turning processes using a CNC lathe. A comparative experimental method was employed, measuring surface roughness (( R_a )) at stepped diameters (16 mm, 24 mm, 32 mm, and 35 mm) with a Mitutoyo Surface Tester SJ-210. Results indicate that G96 mode produces lower surface roughness, with average ( R_a ) values of 2.22 µm (S45C) and 2.27 µm (ST 37) in the N6 class, compared to G97 mode with ( R_a ) values of 3.08 µm (S45C) and 3.03 µm (ST 37) in the N7 class. G96 mode is superior due to its ability to automatically adjust rotational speed based on diameter, whereas in G97 mode, small diameters with high rotation (1273 rpm) increase roughness due to vibration or heat. This study recommends using G96 mode for optimal surface smoothness in step-turning of similar materials. rning of similar materials.
Co-Authors Adhe Aryswan Adi Syahputra Purba Adimas, Adimas Ahmad Farhan, Ahmad Annisa Fyona Ari Wibowo Aulia Fajrin Auliana Diah Wilujeng Baharudin, Budi Batubara, Ninda Batubara, Ninda Hardina Budi Baharudin Budiman Budiman Butar, Hendra Butar Cahyo Budi Nugroho Danang Cahyagi Dety Febrianti Dimas Prasetyo Domi Kamsyah Dupan, Pandi Dzulfikar, Mohamad Alif Fajrin, Aulia Fedia Restu Firmansyah, Adi Ridho Hanifah Widiastuti Hasan Fajriansyah Ramadhani Hendra Saputra Ihsan Saputra Irawan, Benny Haddli Ita Wijayanti James Siregar Khollilurrahman, Kholillurrahman Lalu Giat Juangsa Putra Leo Van Gunawan Manurung, Meilani Manurung, Meilani Mandalena Mega Fatimah Rosana Mega Gemala Meilani Mandhalena Manurung Mohamad Alif Dzulfiqar Mufariz, Mufti Fathonah Mufti Fathonah Muvariz Muhammad Ismail Mutiarani Mutiarani MUTIARANI MUTIARANI Nadhrah Wivanius Naufal Abdurrahman Prasetyo Nicolanta Hiskia Sembiring Nidia Yuniarsih Nugroho Pratomo Ariyanto Nurman Pamungkas Nurul Laili Arifin Nurul Ulfah Nurul Ulfah Purba, Adi Rahman Hakim Rahman Hakim Rahman Hakim Reynaldi, Muhammad Ryan Rohmat, Abdul Rosbandrio, Wowo Roza Puspita Salman Al Faris Sapto Wiratno Satoto Siregar, James Suheri Suheri Widodo Widodo Widodo Widodo Windy Stefani