Human performance flow diagram

Figure 2.3 Overview of Human Performance Tools, Example Flow Diagram of Individual Tool Use. DOE (2009a).

After the task analysis forms have been filled out, you may wish to develop an operational sequence diagram. This is a graphical depiction of human-machine interactions and decision-making flow in the performance of a task over time. Because this graphical system representation is so labor intensive, it should be used only for very complex systems, such as nuclear power plant operations. 

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