Residual risk refers to the level of risk that remains after actions and controls (such as mitigation efforts, safeguards, or risk treatment plans) have been applied. It is an inevitable part of risk management, as it is nearly impossible to eliminate all risks completely. Understanding and managing residual risk is critical for decision-making, especially in governance, risk, and compliance activities.
Key Concepts About Residual Risk:
Definition:
Residual risk = Inherent risk (risk before controls) − Impact of risk controls.
Role in Risk Management:
Residual risk helps organizations determine whether additional actions are necessary or whether the remaining risk is within the organization’s risk appetite or tolerance levels.
Example:
In cybersecurity, even after implementing firewalls, encryption, and employee training, there remains a residual risk of a data breach due to new and emerging threats.
Why Option C is Correct:
Residual risk is specifically defined as the level of risk in the presence of actions and controls, making Option C the correct answer.
Why the Other Options Are Incorrect:
A. Risk transferred to a third party: Transferred risk is part of risk treatment (e.g., through insurance), but it does not define residual risk.
B. Risk in all business activities: This refers to inherent risk, not residual risk.
D. Risk remaining after eliminating all threats: It is nearly impossible to eliminate all threats; residual risk acknowledges what remains after controls are applied.
References and Resources:
ISO 31000:2018 – Risk Management Guidelines: Defines residual risk as the remaining risk after mitigation measures.
NIST Risk Management Framework (RMF) – Highlights residual risk as a critical factor in risk assessment and decision-making.
COSO ERM Framework – Discusses residual risk in the context of enterprise risk management.
