What is the difference between a control deficiency, a significant deficiency, and a material weakness?
A core Audit & Assurance interview question — asked in analyst and associate interviews across IB, PE, and the Big 4.
THE SHORT ANSWER
A control deficiency exists when the design or operation of a control does not allow management or employees to prevent or detect misstatements on a timely basis. A significant deficiency is a deficiency or combination of deficiencies that is less severe than a material weakness yet important enough to merit attention by those charged with governance. A material weakness is a deficiency or combination of deficiencies such that there is a reasonable possibility that a material misstatement will not be prevented or detected on a timely basis.
WHAT INTERVIEWERS LISTEN FOR
- ✓Control deficiency: general failure in control.
- ✓Significant deficiency: important but not material weakness.
- ✓Material weakness: reasonable possibility of material misstatement.
COMMON MISTAKES
- ✗Equating significant deficiency with material weakness.
- ✗Ignoring the 'reasonable possibility' criterion for material weakness.
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