Analyzing Analyzing Cost of Poor Quality and the Effectiveness of the Welder Performance Qualification Test in Mitigating Cost Inefficiency Risks in Steel Fabrication EPC Projects
DOI:
https://doi.org/10.24256/kharaj.v8i3.11463Keywords:
WPQT, Welder Competency, Repair Rate, Project Cost Performance, Cost of Poor Quality (CoPQ).Abstract
Studi ini meneliti pengaruh implementasi Uji Kualifikasi Kinerja Tukang Las (WPQT) terhadap kinerja biaya proyek melalui kompetensi tukang las dan tingkat perbaikan dalam kerangka Biaya Kualitas Buruk (CoPQ) di industri EPC fabrikasi baja. Pendekatan penjelasan kuantitatif digunakan dengan memanfaatkan data dari catatan WPQT, laporan Pengujian Ultrasonik (UT), dan kuesioner kompetensi tukang las. Sampel terdiri dari 52 tukang las yang terlibat dalam Proyek JOTR–Salak Unit 7, yang dipilih melalui teknik pengambilan sampel sensus. Data dianalisis menggunakan Pemodelan Persamaan Struktural Kuadrat Terkecil Parsial (PLS-SEM). Hasil penelitian menunjukkan bahwa WPQT berpengaruh positif terhadap kompetensi tukang las, sementara kompetensi tukang las secara signifikan mengurangi tingkat perbaikan. Pada gilirannya, tingkat perbaikan yang lebih tinggi berdampak negatif terhadap kinerja biaya proyek dengan meningkatkan biaya kegagalan. Lebih lanjut, kompetensi tukang las dan tingkat perbaikan memediasi hubungan antara WPQT dan kinerja biaya proyek. Temuan ini menunjukkan bahwa WPQT tidak hanya berfungsi sebagai persyaratan kualifikasi tetapi juga sebagai mekanisme pengendalian mutu strategis untuk meningkatkan kinerja biaya dalam proyek EPC.
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