AN INVESTIGATION OF TIME-COST-RISK TRADE-OFF IN THE INSTALLATION OF X-RAY MACHINE USING RESPONSE SURFACE METHODOLOGY. Nigerian Journal of Technology, [S. l.], v. 33, n. 4, p. 482–489, 2014. DOI: 10.4314/njt.334.848. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/848. Acesso em: 4 jun. 2026.