The planning phase is crucial for any audit engagement and must be completed and approved before starting fieldwork. This ensures that the engagement has a clear scope, objectives, and methodology, which are necessary for conducting an effective and efficient audit. Without proper planning, the audit team may miss critical areas or waste resources on low-priority risks.

IIA References:

IIA Standard 2200: Engagement Planning requires that internal auditors develop and document a plan for each engagement, including the engagement’s objectives, scope, timing, and resource allocations, before starting fieldwork.

The Practice Guide on Planning emphasizes that completing and approving the planning phase ensures that all necessary preparations are made, and potential risks are identified and mitigated before fieldwork begins.