Which of the following is a Key Control Indicator (KCI) that measures the effectiveness of a control?
Control exception rate quantifies how often a control fails to operate as intended, directly evidencing control effectiveness. Risk appetite thresholds, incident counts and loss totals measure outcomes or tolerance rather than the control's own operating performance.
Why this answer
A Key Control Indicator (KCI) measures how well a specific control is operating. Control exception rate — the frequency with which a control fails or is bypassed — directly measures control effectiveness, making it a textbook KCI. The other options measure risk events, audit timing, or training completion, which are KRIs or compliance metrics.
Exam trap
CRISC often tests the distinction between KCIs (control effectiveness) and KRIs (risk exposure); candidates who pick 'number of risk events' or 'training completion' confuse risk indicators with control indicators.
How to eliminate wrong answers
Option B is wrong because the number of risk events is a Key Risk Indicator (KRI) measuring realized risk, not control performance. Option C is wrong because time since last audit is an assurance scheduling metric, not a measure of control effectiveness. Option D is wrong because training completion percentage measures a training program's reach (a compliance or awareness metric), not the operational effectiveness of a specific control.