The performance shaping factors (PSFs) of the standardized plant analysis of risk-human reliability analysis (SPAR-H) method are unclearly defined, which contributes to the uncertainty of human reliability analysis (HRA) in nuclear power plants (NPPs). This work proposes an expert-based modification approach for redefining the PSFs based on four criteria in terms of less overlap, hierarchy, flexibility, and digitalization.

For demonstration, the proposed approach is used to assign PSFs to three specific human failure events in NPPs. Three tests (Kendall's W Test, Jonckheere-Terpstra Test, and Paired Samples Test) are applied to analyze the assignments. Compared to the PSF assignment of SPAR-H, the results show that the redefined PSFs meet the four criteria and reduce the overestimation of human error probabilities (HEPs).

风险-人的可靠性分析（SPAR-H）方法的标准工厂分析的性能塑造因子（PSF）的定义不明确，这导致了核电厂（NPP）的人的可靠性分析（HRA）的不确定性。这项工作提出了一种基于专家的修改方法，用于基于较少重叠，层次，灵活性和数字化的四个标准来重新定义PSF。

为了进行演示，所提出的方法用于将PSF分配给NPP中的三个特定的人为失误事件。三种测试（Kendall的W检验，Jonckheere-Terpstra检验和配对样本检验）用于分析分配。与SPAR-H的PSF分配相比，结果表明，重新定义的PSF符合四个标准，并减少了对人为错误概率（HEP）的高估。