Abstract: In large complex systems such as nuclear power plants (NPPs), most people work in teams or groups. However, the current human reliability analysis (HRA) methods used in probability safety assessment (PSA) of NPPs are generally focused on the assessment of individual performance. The technique for human error rate prediction (THERP) and human cognitive reliability (HCR) are the most widely used human reliability analysis methods. Therefore, the limitations will exist consequentially when we use the current HRA methods to quantify the actual human performance situation in the control room of NPPs. In this paper, a new performance shaping factor (PSF) named team performance shaping factor (TPSF) was defined and a qualitative framework used to integrate the TPSF into THERP method and HCR model respectively in accordance with the existing architectures was proposed. The process for evaluating the grade of TPSF was put forward, and the question that should be solved in order to accomplish the quantitative analysis was discussed. The result shows that integrating team factor into current HRA will enhance the ability and validity in modeling the human performance in team context.