Hazards & criticality

1. Define the ranges of likelihood and severity by pressing the appropriate buttons. Both can be a number from 1 to 10, with 3 to 10 possible values in the range — typically company or program defined. Examples: 1–10; 1,2,3,4,5; 1,2,3; 1,4,7,10.
2. Save the numeric ranges and a text description of each likelihood or severity level.
3. The checkbox denotes that the lowest number is the highest risk. Unchecked, the highest severity is considered the highest risk.
4. Enter each mission and/or safety hazard, and select the severity level that applies.
5. Press Enter to add more hazards.
6. Press Esc to delete a hazard.
7. Press Save to save the list of hazards.

On the Effects page, there’s a column for hazard tagging — a combo box listing your hazards from H1 to Hx. During failure mode analysis, select the hazard that best tags to the effects of that failure mode. Tagging is done by a cross-functional team of subject matter experts, including software and systems development. Severity auto-fills from the hazards table you define here, which can be updated at any time.