MOHAMMAD FUAD ZAMRONI; NURHIDAYAH; ABDULLAH SYAKUR NOVIANTO. 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. Al-Kharaj: Journal of Islamic Economic and Business, [S. l.], v. 8, n. 3, 2026. DOI: 10.24256/kharaj.v8i3.11463. Disponível em: https://ejournal.iainpalopo.ac.id/index.php/alkharaj/article/view/11463. Acesso em: 8 jul. 2026.