MUHAMMAD HAFIZUDDIN ISA; SITI KHALIJAH YAMAN. Productivity Assessment in Roofing and Wall Painting Works Using Direct Observation Methods at Construction Site. Journal of Structural Monitoring and Built Environment, [S. l.], v. 6, n. 1, p. 26–36, 2026. Disponível em: https://publisher.uthm.edu.my/ojs/index.php/jsmbe/article/view/20562. Acesso em: 24 jul. 2026.