The purpose of a follow-up audit is to verify the completion and effectiveness of corrective actions taken by the auditee in response to the nonconformities identified in a previous audit1. A follow-up audit is a type of audit that is conducted after an initial audit, and it focuses on the specific areas where nonconformities were found and corrective actions were agreed upon2. A follow-up audit can be conducted as a separate audit or as part of a scheduled audit, depending on the nature and severity of the nonconformities and the audit programme objectives3.

The other options are not the purpose of a follow-up audit, but rather the purpose of other types of audits. For example:

•Option A is the purpose of a performance audit, which is a type of audit that evaluates the effectiveness of the management system in achieving its intended results4.

•Option B is the purpose of a compliance audit, which is a type of audit that verifies the conformity of the management system with the specified requirements, such as the ISMS objectives5.

•Option C is the purpose of a process audit, which is a type of audit that examines the inputs, activities, outputs, and interactions of a specific process within the management system, such as the risk treatment process.

References: 1: ISO 19011:2018, 6.7; 2: ISO 19011:2018, 3.7; 3: ISO 19011:2018, 5.5.2; 4: ISO 19011:2018, 3.6; 5: ISO 19011:2018, 3.5; : ISO 19011:2018, 3.4; : ISO 19011:2018; : ISO 19011:2018; : ISO 19011:2018; : ISO 19011:2018; : ISO 19011:2018; : [ISO 19011:2018]