Shutdown - Normal
Description
Procedures must be provided for the normal shutdown of a process, which is a planned shutdown (Scholtz & Maher, 2014).
Unique Considerations (Peres et al., 2016)
With frequently performed normal shutdown procedures, operators will often have performed the procedures many times, and may experience the following:
- Complacency regarding safety measures and carrying out procedural steps properly.
- Commitment of the necessary steps in the task to memory, possibly reducing the number of times to which the procedure is referred.
- Overconfidence in their ability to perform the tasks.
- Boredom due to monotony of repetitive tasks.
With infrequently performed normal shutdown procedures:
- Operators may be unfamiliar with the procedures.
- Operators may experience elevated stress due to unfamiliarity with and uncertainty of shutdown operations.
Guideline: Procedural Step Conciseness
Write normal shutdown procedural steps using only information that is necessary to perform the shutdown safely.
Support
Operators tend to be less likely to use procedures when extraneous information is presented in procedures, particularly for those used for routine tasks (Sasangohar et al., 2018).
Example
Use:
Press and hold button B101 until green light appears, then release button.
Instead of:
Press the red, rectangular shaped button with label B101 beneath it and hold it. In a few seconds a green light 2 inches above the button will light. When this occurs, release the button.
Press and hold button B101 until green light appears, then release button.
Instead of:
Press the red, rectangular shaped button with label B101 beneath it and hold it. In a few seconds a green light 2 inches above the button will light. When this occurs, release the button.