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Penerapan Metode CPM dan Crashing pada Proyek Fabrikasi Jembatan B-60 di PT XYZ Umam, Khotibul; Syaugi, Ahmad; Syarif, Muhamad Rasyid; Izzati, Billa; Prastyo, Yudi
Factory Jurnal Industri, Manajemen dan Rekayasa Sistem Industri Vol. 4 No. 2 (2025): Edisi Desember
Publisher : Ilmu Bersama Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56211/factory.v4i2.846

Abstract

Perencanaan dan pengendalian waktu serta biaya adalah faktor penting dalam menentukan keberhasilan proyek, termasuk proyek fabrikasi jembatan B-60 yang dikerjakan oleh PT XYZ. Penelitian ini bertujuan untuk menerapan metode Critical Path Metode (CPM) untuk menentukan jalur kritis dan membandingkan efektivitas strategi crashing dalam mempercepat pekerjaan proyek, dengan dua alternatif strategi crashing yaitu penambahan tenaga kerja dan penambahan jam kerja (lembur) selama 4 jam. Analisis ini dilakukan melalui pementaan kegiatan proyek, estimasi biaya dan waktu pada saat pengerjaan normal. Hasil dari penelitian ini menunjukan bahwa jalur kritis proyek terdiri dari delapan kegiatan utama yang memiliki kontribusi signifikan terhadap total durasi. Penambahan tenaga kerja menghasilkan durasi pengerjaan proyek selama 86 hari kerja dengan total biaya proyek sebesar Rp. 156.217.011 Sementara itu, penambahan jam lembur selama 4 jam menghasilkan durasi pengerjaan proyek selama 90 hari kerja dengan total biaya proyek sebesar Rp. 172.013.879. Berdasarkan perbandingan efektivitas waktu dan biaya, alternatif penambahan tenaga kerja dinilai lebih efisien dan dipilih sebagai strategi crashing paling optimal dalam proyek ini
Analysis of Layout Design Discrepancies Generated in the Proofreading Process for Product Quality Improvement in the Label & Packaging Manufacturing Industry: Evidence from XYZ Company Fajar, Fahri Fadilah; Yaqin, Maulana Ainul; Nuraini, Salsabila Syifa; Trisna, Trisna; Prastyo, Yudi
Review: Journal of Multidisciplinary in Social Sciences Vol. 2 No. 12 (2025): December 2025
Publisher : Lentera Ilmu Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59422/rjmss.v2i12.1100

Abstract

PT XYZ Packaging Indonesia is a company that produces various types of packaging for the garment industry, such as labels, stickers, printed labels, and related accessories, with integrated services from concept to execution. This research analyzes design layout discrepancies in the proofreading process, including content shifts, color errors, text format, cutting lines, fonts, as well as barcode and style/PO mismatches, which impact increased rejections, potential customer complaints, and production losses. In the last three months, the company recorded an average proofreading defect of 15%, mainly due to content errors of 10%. Using the PDCA method, the research identified root causes such as the absence of visual inspection standards, inconsistent work instructions, high workload, and suboptimal digital proofing. Through PDCA, improvements were implemented including standard checklists, two-step verification, increased operator training, and integration of automatic preflight software which reduced proofreading errors to 0%. These results confirm that PDCA effectively improves design layout accuracy and reduces rejects, as well as highlighting the importance of prepress-based quality control in the label and packaging industry.
Preventive Analysis of Polymer Leakage in Injection Molding Machines and Its Impact on Production Efficiency Rafli, Muhamad; Maulana, Dandi; Rachmadi, Tri; Takuya, Takuya; Prastyo, Yudi
Review: Journal of Multidisciplinary in Social Sciences Vol. 2 No. 12 (2025): December 2025
Publisher : Lentera Ilmu Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59422/rjmss.v2i12.1101

Abstract

This study examines the causes and impacts of polymer leakage in a 500-ton injection molding machine, which frequently occurs at the nozzle and sprue bushing junction. Leakage is caused by seal wear, excessive injection pressure, and nozzle misalignment, which enlarges microgaps. Measurements show that at a pressure of 150 MPa and a temperature of 250°C, the leakage rate reaches 20–100 ml/h. Through Autodesk Moldflow simulations, the nozzle-sprue transition area was identified as the point of maximum pressure (152 MPa) with the highest leakage potential, thereby extending conventional maintenance diagnostics through simulation-based identification of critical stress zones rather than relying solely on routine visual inspection. After optimizing the design and process parameters including reducing the injection pressure to 140 MPa, using heat-resistant Viton seals up to 250°C, and readjusting the nozzle position the leakage rate decreased by 70% (from 60 ml/h to 18 ml/h). The output of this study is a leak prevention model based on visual inspection, direct measurement, and numerical simulation, which distinguishes this work from standard industrial troubleshooting by integrating predictive simulation with quantitative cost-saving analysis, enabling an increase in production efficiency by ± 5 percent and operational cost savings of approximately US$1,800 per year per machine.
Co-Authors Abdilah, Heri Sugianto Abdul Azis Abdul Latip, Abdul Abdurrahman, M. Humam Adhitia, Dimas Adriansyah, Aden Panca Agus Setiawan Agus, Ceng Agustin, Tyna Kurniati Noer Ahmad Jalaludin, Ahmad Aini, Nevi Fitria Aji, Ari Purnomo Ajiz, Aris Abdul Akbar, Reza Aprila Alam, Ihsan Cahya Alamsyah, Mahlufi Alfajri, Aktsa Alfariza, Muhammad Rizki Alfatih, Muhamad Alfatonah, Zahrotul Alfiansyah , Daffa Alvarizi, Dava Fahri Alwan, Naufal Andika, Wazri Himawansyah Putra Angga Setiawan Apriono, Daniel Kristanto Apriyono, Rahmad Aqilah, Jeanytha Thifal Ardiansyah, Refani Arief, Moch Zaenal Ariya, Restu Aryanti, Ranti Asep Supriyadi AYU RAHMAWATI Aziz, Khaerul Azzahra, Arsy Mayra Baesuni, Selvy Rahma Bari, Isyat Zain Bayu Setiawan Berliana, Salsabila Boimau, Devrin Budiman, Banyu Sugara Burhanudin, Ahmad Zaky Dahlia, Santi Danar, Aditya Darmansyah, Deden Derajat, Shandi Dewanto Azmi Pradana Dimas, Akmal Dwi Irawan Dzaky, Muhammad Haidar Eka Saputra, Rizky Bagus Elfirawati, Putri Arwen Eman Sulaiman, Eman Erlangga P, Muhamad Fadlan, Khafi Dehan Fadli, Rozul Fajar, Fahri Fadilah Fauzi , Dede Ahmad Fauziah, Ade Ahmal Fayad, Muhamad Wiro Al Fazliansyah, Muhamad Rohul Ferdiansyah, Yudha Galih Prasetyo Gunawan, Iman Hafidz Akbar Halim Hanafi, Muhammad Imam Hartanto K, Deni Hartono Hartono Heryanto, Reifal Deri Hidayat , Rahmat Hidayat, Sulthan Muhammad Rizky Hikam, Amar Syaifullah Hildayanti, Jamillah Ibrahim, Muhammad Afif Ida Ayu Putu Sri Widnyani Ilaika, Fadila Irawan, Bryan Ade Izzati, Billa Jailaani, Rizki Jayadih, Epan Joko Mulyono Kenedy, John KHAIRUNNISA, SYAFIRA Khotibul Umam Kinasih, Sekar Kurniawan, Varas Pratama Putra Kuswoyo, Nur Indra Lesmana, Dede Indra Maghfur, Abdullah Maulan, Anggita Muhamad Maulana, Dandi Maulana, Firman Ajib Maulana, M Wanda Mickola, Reza Mochamad Yusuf Alsagaff Muhammad Arif Muhammad Ilham Muhammad Irfan Muhammad Rayhan Muhammad, Alfian Nur Mulya, Owen Najmurijal, Muhammad Fikri Nasution, Kerina Putri Ngudi Wiyatno, Tri Nisa, Aqila Ulya Nizar, Aufa Novaliana, Mery Nst, Mhd Fachrur Rozi Nugraha, Damar Nugraha, Wildani Nugroho, Arief Teguh Nugroho, Azwar Anas Agung Nugroho, Irvan Nuraini, Salsabila Syifa Nurali, Muhammad Nurdyanto, Awal Rizky Sri Nurhidayah, Della Nurrohman, Ade Syahrian Ofianto, Afandy Bayu Permadi, Ricky Permana R, Alief Pramuja, Irgi Sugeng Pranata, Juan Prasetyo , Eko Prasetyo, Teddy Pratama, Ilham Pratama, Mohammad Rafi prayoga, Achmad dani Puspita, Gita Wina Putra, Bayu Eka Putra, Chaello Agries Putra, Daffa Darissyah Putra, Dwiki Kencana Putra, Muhammad Alfarizy Putra, Muhammad Reza Ramanda Rachmadi, Tri Rafli, Muhamad Rafliadi, Muhammad Naufal Rahayu A, Dewi Rakes, David Ramadhan, Bryan Bagus Ramadhan, Naufal Ramadhani, Fajri Ramadhani, Muhammad Naufal RAMDHANI RAMDHANI Ramlan, Rosyadi Renaldi, Daffa Azhari Risma Amelia, Risma Rivaldo, Brema Rizaldi, Edwin Hafidz Rizki, Haqil Miftahul Rozak, Fatkhu Salaf, Fatwa Aulia Salsabila, Niswa Samihah, Ghina Saputra, Graha Laksyah Dwi Sarmauli, Bulan Septiawan, Tegar Setiawan, Muhammad Fathurrohim Sibarani, Daniel Sinambela, Sebdi Five Solehudin , Sihab Akbar Suhendra Suhendra Suyatno, Ari Syafira, Desta Dude Syahputra, Rivaldi Bakti Syaifullah, Agus Muhammad Syamsudin, Napih Syarif, Muhamad Rasyid Syaugi, Ahmad Takuya, Takuya Tampubolon, Nicolas Matthew Thabrani, Reyhan Trijayadi, M. Agung Trisna Trisna, Trisna Turseno, Andi Tyas, Ajeng Asrining VBFB, Egha Vera Yunita Vinawati, Lisna Nur Virgy, Bunga Azalia Wardani, Zaqki Maulana Wellmi, Nieky Wibiksana , Fajar Yaqin, Maulana Ainul Yelis, Yelis Yudin, Muhammad Rafli Yuditama, M. Farhan Yustianto, Yustianto Yusuf, Akbar Maulana Yusuf, Muhamad Sulaiman Nur