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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y control activities and when the task situation is not well-defined from an operator’s perspective. Applicants may also use human performance modelling techniques, provided they can show that those techniques can provide reasonable results. In addition, SMEs should have system descriptions to fully understand the tasks and how they are performed. c. The applicant should conduct a timeline analysis of the time required to complete tasks with respect to the time available. The analysis should consider: • system timing, such as the time the system takes to respond to an action before another action can be taken • the time required to perform covert cognitive tasks, such as situation assessment and response planning • the effects of multitasking and the potential for primary task disruption created by overlapping primary tasks, dependent tasks, and independent tasks d. The applicant should analyze the physical and cognitive workload associated with task performance. The analysis should consider the effects of multitasking and the potential for primary task disruption created by overlapping primary tasks, dependent tasks, and independent tasks. 8 The CTA addresses limitations in current task analysis methods, such as: • Traditional task analysis methods mainly focus on physical activity (observable behaviors). However, as modern plants become much more highly automated, the role of personnel becomes less-and-less activity oriented, and more-and-more cognition oriented. Traditional methods are limited in their ability to analyze cognitive, supervisory control tasks. • Traditional methods tend to focus on the ways tasks should be performed from the perspective of designers, procedure developers, and trainers. These perspectives do not always capture how work is actually performed in the plant under the demands of the real work environment. (This is one of the primary concerns addressed in this new guidance.) • Traditional methods do not address well what