Brookvale Health has a low appetite for patient-data breaches. An auditor reviews a newly designed access-control response and confirms the design would, if operating as intended, keep breach exposure within appetite. The auditor now wants to conclude on whether the response actually keeps the risk within appetite in practice. What should the auditor do next?
- AConclude that the risk is within appetite on the strength of the design assessment, since a control designed to meet appetite will keep exposure within it once live.
- BTest whether the access controls are operating effectively over the period, because a well-designed response only keeps risk within appetite if it works in practice. Correct
- CRecommend widening the organisation's appetite for data breaches so that the current level of residual exposure comfortably falls inside the revised boundary.
- DTake ownership of the access-control monitoring going forward so the auditor can personally guarantee the response keeps breaches within appetite each month.
Why A is wrong: This confuses design with operating effectiveness; a sound design can still fail in operation, so concluding from design alone is a classic error and is wrong.
Why B is correct: Design suitability alone does not confirm the risk is controlled; testing operating effectiveness over time is what lets the auditor conclude the response actually keeps exposure within appetite, so this is correct.
Why C is wrong: Appetite is set by the board, and moving it to fit exposure is a governance decision the auditor should not drive; it also dodges the real question of whether the control works, so this is wrong.
Why D is wrong: Owning ongoing monitoring is a management activity that would impair independence and prevent objective future assurance, so this action breaches the Three Lines Model and is wrong.