Document: NUREG-0800
Document ID: eedf1a7c-578e-463a-9608-b06af6312cf1
Document Type: srp
Title: HUMAN FACTORS ENGINEERING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1310/ML13108A095.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18.0
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timates, through a method applicable to the human-system interface (HSI) characteristics of the control system. The vendor/licensee/applicant should also provide a statement as to how elements such as diagnostics, communications, travel time, and work environment affect the time required for the action. Acceptable methods for deriving time estimates for individual task components include, but are not limited to: • Operator interviews and surveys • Operating experience reviews • Software models of human behavior, such as task network modeling • Use of control/display mockups • Expert panel elicitation2 • American National Standards Institute (ANSI)/American National Standards (ANS), ANSI/ANS 58.8, “Time Response Design Criteria for Safety-Related Operator Actions.” 3 Methods that are dependent on expert judgment to derive time estimates for task components are potentially subject to bias. In addition, the uncertainties associated with estimates derived through these methods are difficult to quantify. Accordingly, these methods should be employed using structured approaches that minimize bias and help identify and assess uncertainties (see example: NUREG/CR-6372, “Recommendations for Probabilistic Seismic Hazard Analysis: Guidance on Uncertainty and Use of Experts,” or “Eliciting and Analyzing Expert Judgment: A Practical Guide, Cambridge University Press,” 1991). Prior experience with tasks or subtasks similar to the actions proposed to be credited in the analysis may provide valuable insights for the analysis/estimates of operator response times. Operating experience data used to provide input to the analysis/estimates of operator response times should be supplemented with information about the similarities and differences between the credited actions and the actions identified in the operating experience. 2 For an example of an expert panel elicitation, see NUREG-1852, “Demonstrating the Feasibility and Reliability of Operator Manual