Within each unplanned event, a severity scale can be used to further assess the impact on the project from defects and failures. RT-313 utilized qualitative severity levels of Low (L), Medium (M), and High (H) for defects and failures. The levels are non-quantitative and are established by each organization based on the quality event’s estimated impact on the project safety, cost, and schedule. Note that the team assessed that variations do not require a severity scale, as project impact relative to safety, cost, and/or schedule is always considered to be Low, given the as-identified quality issue is accepted as-is.
Note : % = Impact of Quality Event as a Percent of the Project Total Value.
Severity Weighting Scale (wi):
Variation = 1
Defect – Low Severity = 2
Defect – Medium Severity = 4
Defect – High Severity = 6
Failure – Low Severity = 8
Failure – Medium Severity = 16
Failure – High Severity = 24