Abstract:
General Background: Quality risk mitigation is essential for maintaining production stability and product conformity in manufacturing industries. Specific Background: PT XYZ produces High Density Polyethylene plastic bags in various sizes, with the 15×30 size exhibiting the highest defect rate during January–September 2025, particularly folded, incorrect cutting, asymmetrical cut, and no handle hole defects. Knowledge Gap: Previous studies generally applied Fault Tree Analysis (FTA) or Failure Mode and Effect Analysis (FMEA) separately or focused on limited defect types and specific production stages, resulting in less comprehensive defect evaluation. Aims: This study aims to systematically identify root causes and determine improvement priorities for dominant defects in 15×30 HDPE plastic bag production through an integrated FTA and FMEA framework. Results: FTA identified 15 critical basic events associated with operator control, machine condition, material handling, and maintenance practices. Defect probability values were 7.079% for folded, 9.314% for incorrect cutting, 9.741% for asymmetrical cut, and 6.635% for no handle hole defects. FMEA results showed the highest Risk Priority Number for folded defects (RPN 240), followed by incorrect cutting (RPN 210), asymmetrical cut (RPN 180), and no handle hole (RPN 175). Novelty: The study integrates deductive root cause modeling and quantitative risk prioritization within a single analytical structure applied to a specific industrial product size. Implications: The proposed actions, including SOP standardization, preventive maintenance, calibration, and operator monitoring, provide structured guidance for systematic defect reduction and sustainable quality management in HDPE plastic bag manufacturing.
Highlights:
Fifteen critical basic events were mapped across operator, machine, material, and maintenance factors.
Incorrect cutting and asymmetrical cut showed the largest probability values among dominant nonconformities.
Risk prioritization placed folded nonconformity at the top improvement rank based on RPN assessment.
Keywords: Fault Tree Analysis, Failure Mode and Effect Analysis, HDPE Plastic Bags, Defect Probability, Risk Priority Number
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References
R. Ramdani and M. Fadilah, “Analisis Pengendalian Kualitas PT DMI Untuk Mengurangi Tingkat Kerusakan Pada Produk Servo Motor Dengan Menggunakan Metode Six Sigma,” Journal of System and Software Research, vol. 3, no. 2, pp. 13–25, 2025, doi: 10.61722/jssr.v3i2.3792.
N. Z. Laily, R. Septiari, and E. Adriantantri, “Identifikasi Defect Pada Proses Produksi Benang Dalam Upaya Pengendalian Kualitas Di PT Leo Textil,” Jurnal Senopati, vol. 6, no. 2, pp. 151–158, 2025, doi: 10.31284/j.senopati.2025.v6i2.7387.
S. A. Rais and A. S. Cahyana, “Defect Analysis and Solution Through Revolutionizing Recycled Paper Production,” Indonesian Journal of Innovation Studies, vol. 25, no. 3, pp. 1–11, 2024, doi: 10.21070/ijins.v25i3.1163.
M. F. Baad, D. Andesta, and Hidayat, “Analysis of Quality Improvement of Wood Powder Raw Materials at CV NKM Using FMEA and FTA Methods,” G-Tech: Journal of Technology, vol. 8, no. 1, pp. 186–195, 2024. [Online]. Available: https://ejournal.uniramalang.ac.id/index.php/g-tech/article/view/1823/1229
A. N. Rukmana et al., “Enhancing Reliability in Garment Manufacturing Through FMEA and FTA,” Applied Logistics, vol. 11, no. 4, pp. 579–587, 2024, doi: 10.22306/al.v11i4.548.
Z. Ramadhani and Y. P. Negoro, “Penerapan Failure Mode and Effect Analysis (FMEA) Dan Fault Tree Analysis (FTA) Untuk Mengidentifikasi Kecacatan Palet Kayu (Studi Kasus: CV Mandiri Jaya),” Jurnal Teknik Manajemen Industri dan Teknologi, vol. 4, no. 3, pp. 815–824, 2025, doi: 10.55826/jtmit.v4i3.1039.
A. Wicaksono and F. Yuamita, “Pengendalian Kualitas Produksi Sarden Menggunakan Metode Failure Mode and Effect Analysis (FMEA) Dan Fault Tree Analysis (FTA) Untuk Meminimalkan Cacat Kaleng Di PT XYZ,” Jurnal Teknologi Manajemen Industri, vol. 1, no. 3, pp. 145–154, 2022, doi: 10.55826/tmit.v1i3.44.
R. Fitriana and I. P. Sari, “Peningkatan Kualitas Proses Produksi Tahu Menggunakan Metode FMEA Dan FTA (Studi Kasus: Pabrik Tahu DN),” Jurnal Teknologi Industri Pertanian, vol. 33, no. 3, pp. 277–289, 2023, doi: 10.24961/j.tek.ind.pert.2023.33.3.277.
A. Dharma and M. Nuruddin, “Analyzing Product Defects in the Production Process of Tempeh Using the FTA and FMEA Methods at CV Aderina,” Motivection: Journal of Mechanical, Industrial and Manufacturing Engineering, vol. 5, no. 3, pp. 571–582, 2023, doi: 10.46574/motivection.v5i3.269.
P. A. V. Prasmoro and M. Widyantoro, “Analisis Penerapan Program Keselamatan Kerja Pada Lantai Produksi Dengan Metode Fault Tree Analysis (FTA) Di PT XYZ,” Jurnal Riset Logistik Indonesia, vol. 21, no. 2, pp. 75–82, 2021, doi: 10.37412/jrl.v21i2.119.
W. Ridwan, R. Wulandari, and E. Nurhayati, “Analisis Pengendalian Kualitas Bibit Sawit Dengan Menggunakan Metode Fault Tree Analysis (FTA) Dan Failure Mode and Effect Analysis (FMEA),” Reslaj: Religion Education Social Laa Roiba Journal, vol. 5, no. 6, pp. 3730–3738, 2023, doi: 10.47476/reslaj.v5i6.2741.
M. J. Firmansyah and M. Nuruddin, “Analisis Pengendalian Kualitas Produksi Pada PT XYZ Menggunakan Metode Seven Tools Dan FMEA,” SITEKIN: Jurnal Sains, Teknologi dan Industri, vol. 20, no. 1, pp. 231–238, 2022, doi: 10.24014/sitekin.v20i1.19457.
H. Prisilia and D. A. Purnomo, “Manajemen Risiko K3 Dengan Metode Failure Mode and Effect Analysis (FMEA) Dan Fault Tree Analysis (FTA) Untuk Mengidentifikasi Potensi Dan Penyebab Kecelakaan Kerja (Studi Kasus: Tahap II Pembangunan Gedung Laboratorium DLH Banyuwangi),” Tekmapro: Journal of Industrial Engineering and Management, vol. 17, no. 2, pp. 1–12, 2022, doi: 10.33005/tekmapro.v17i2.299.
A. F. Hafiduddin and Sumiati, “Analysis of Defects in White Crystal Sugar Products at XYZ Sugar Factory Using Fault Tree Analysis (FTA) and Failure Mode and Effect Analysis (FMEA),” Applied Science and Industrial Engineering Conference Proceedings, vol. 6, no. 1, pp. 1–7, 2024, doi: 10.35877/454RI.asci2694.
W. Kurniawan, D. K. Sari, and F. Sabrina, “Perbaikan Kualitas Menggunakan Metode Failure Mode and Effect Analysis Dan Fault Tree Analysis Pada Produk Punch Extruding Red,” E-Kombis: Jurnal Ekonomi dan Bisnis, vol. 10, no. 1, pp. 152–166, 2022, doi: 10.37676/ekombis.v10i1.