ABSTRACT: The human factors area deals with how safely and effectively personnel interact with the processes. To minimize the influence of human factors to incidents, causal relationship of worker???s behavior to safety incidents must be understood. This includes having a methodology to identify potential worker???s behavior influences. Past experience are able provide valuable insight into the types of worker???s behavior that most often contribute to human error and to loss events. This paper suggests a comprehensive assessment framework that enables project managers to take a number of major qualitative factors into consideration when selecting appropriate worker???s behavior modification method. This framework is based on the Analytic Hierarchy Process (AHP) methodology and a survey among construction engineers. The research reveals that training, safety reward, and campaign should be conducted simultaneously and equally to obtain effectiveness in behavior modification