Construction organizations need to not only monitor employees' safety performance, but also to assess their employees' psychological well-being. Promoting a positive safety climate together with developing training programs focusing on improving employees' psychological health - especially post-trauma psychological health - can improve the safety performance of an organization.
Research was undertaken to develop a method to assist in the determination of the lower and upper activity duration values for schedule risk analysis by PERT (program evaluation and review technique) analysis or Monte Carlo simulation. A belief network was the modeling environment used for this purpose, and the resulting model was named ERIC-S: Evaluating Risk In Construction -Schedule Model. The development of the belief network model consisted of four steps. First, construction schedule risks were identified through a literature review, an expert review, and a group review by a team of experts. Second, cause-effect relationships among these risks were identified through an expert survey. This led to the development of the structure of belief network model. Third, probabilities for various combinations of parents for each risk variable were obtained through an expert interview survey and incorporated into the model. And fourth, sensitivity analysis was performed. The model was tested using 17 case studies with very good results.
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