TypicalHumanOperatorFailureRates
ACTIVITYERRORRATE
*Errorofomission/itemembeddedinprocedure…..3x10–3
*Simplearithmeticerrorwithself-checking....……...3x10–2
*Inspectoroversightofoperatorerror...................…...10–1
*Generalrate/highstress/dangerousactivity……..0.2-0.3
*Checkoffprovisionimproperlyused................……0.1-0.9(0.5avg.)
*Errorofomission/10-Itemchecklist........………...10–4-5x10–3(1x10–3avg.)
*Carryoutplantpolicy/nocheckonoperator……..5x10–3-5x10–2(5x10–2avg.)
*Selectwrongcontrol/groupofidentical,labeled,controls..10–3-10–2(3x10–3ave.) |