The COSO Framework provides a comprehensive approach to evaluating internal controls, focusing on five components: Control Environment, Risk Assessment, Control Activities, Information & Communication, and Monitoring. Audit sampling plays a vital role in testing these controls effectively and efficiently.

• Control Environment: Auditors assess the company’s ethical values and management’s commitment to integrity. For example, sampling employee training records can help verify whether staff received proper ethics training.

• Risk Assessment: Auditors identify and analyze risks that could affect objectives. Sampling key risk assessments documents or risk registers ensures risks are regularly reviewed and updated.

• Control Activities: These are policies and procedures designed to mitigate risks. Using audit sampling, an auditor might test a sample of purchase orders to check if proper approval controls are in place and followed.

• Information & Communication: Auditors review how information flows within the organization. Sampling communication logs or reports helps verify that relevant information reaches the right people.

• Monitoring: Ongoing monitoring ensures controls work over time. Auditors sample internal audit reports or follow-up actions to assess the effectiveness of monitoring activities.

For instance, in an audit of accounts payable, sampling invoices and approval documents allows the auditor to test whether internal controls comply with the COSO Framework. This structured use of sampling supports a thorough evaluation of controls while optimizing audit resources.