Last reviewed and updated | October 20, 2026
Control effectiveness
How well a control achieves its intended objective. It measures actual performance against defined criteria, not just whether the control exists.
Why it matters
- A control can be in place and still fail to reduce risk.
- Effectiveness is the measure boards and auditors ask about.
- It directs remediation to the controls that matter.
How it works
- Define pass criteria per control.
- Collect the data.
- Calculate the result.
- Trend it over time.