Definition:
A required Safety-Margin is a Scalar difference between a required defined target or Constraint Level, and its calculated safety Level derived using the appropriate Safety-Factor.
Alternative Names
Concept Number: *637
English Master: Safty-Margin
Synonyms, Variations & Acronyms: none
Detailing
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Illustrations
Illustration:
Figure shows the required Safety-Margin for a required performance Level.
Type
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Examples
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Notes
Notes:
An estimated or actual Safety-Margin can also be calculated. If no specific required Safety-Factor is specified then the Safety-Margin can be calculated relative to the (estimated or actual) target or Constraint Level (100%, equivalent to a Safety-Factor of 1).
A Safety-Margin can also be expressed as a percentage based on the target or Constraint Level being 100%, and the Baseline being 0%.
A “Safety-Factor”, by comparison, is a dimensionless ratio.
Keyed-Icons
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Drawn-Icons
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Related-Concepts
Safety-Factor *131
Safety-Deviation *405
History-of-Concept
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This Concept entered by Lisa.