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tolerable exception risk (TER)
how often can a control fail and still and we still conclude it operates effectively
acceptable risk of over-reliance (ARO)
rest that we’re willing to rely on control when it doesn’t work
estimated population exception rate (EPER)
estimation of control’s failure rate before we begin sampling
sample exception rate (SER)
number of exceptions/sample size
Allowance for Sampling Risk
method of evaluating sampling risk for nonstatistical samples, (TER-SER)
SER > TER
bad, control not operating effectively
SER < TER
good, controls operating effectively
computed upper exception rate (CUER)
max error rate in population within particular interval (CUER = SER + allowance for sampling risk)
CUER > TER
Bad, The risk is higher than ARO (%) that the control fails more than is tolerable
CUER <(or equal to) TER
Good, The risk is less than ARO (%) that the control fails more than is tolerable