The IS audit process is a structured approach used by an IS auditor to plan, execute, report, and follow up on an audit engagement. For CISA, audit phases are important because many questions test what the auditor should do FIRST, BEST, NEXT, or MOST appropriately at each stage.
The standard exam-friendly sequence is: Planning → Fieldwork / Documentation → Reporting → Follow-up
Some materials mention Documentation separately, but practically it happens throughout the audit, especially during fieldwork and reporting.
Record procedures, evidence, findings, and conclusions
Work papers must support audit conclusions
Reporting
Communicate results to management and stakeholders
Discuss findings, management response, final report
Follow-up
Verify corrective action
Confirm remediation and operating effectiveness
Phase 1: Planning
The planning phase determines the direction of the audit. It defines the audit objective, scope, methodology, resources, and areas of focus.
Key Activities:
Define the audit objective
Define the audit scope
Understand the business process or system being audited
Identify applicable:
Policies
Standards
Procedures
Laws and regulations
Review previous audit reports and prior findings
Perform a risk assessment
Identify high-risk areas
Prepare the audit plan
Develop the audit program
Allocate audit resources
Establish communication with stakeholders
Exam Tip: The most critical planning activity is usually: Performing a risk assessment. Why? Because risk assessment helps determine where audit effort should be focused.
If resources are limited, the auditor should: Focus on high-risk areas. Do not choose options like auditing all areas equally or simply following management preference.
Audit Plan vs Audit Program
Term
Meaning
Audit Plan
High-level plan showing audit objective, scope, timing, resources, and approach
Audit Program
Detailed step-by-step audit procedures to execute the audit
Phase 2: Fieldwork
The fieldwork phase is where the auditor performs audit procedures, tests controls, gathers evidence, and validates whether controls are designed and operating effectively.
Key Activities
Conduct interviews
Observe processes
Inspect documents and records
Review configurations and logs
Perform control testing
Perform compliance testing
Perform substantive testing
Use CAATs or data analytics where appropriate
Identify potential findings
Gather sufficient and appropriate evidence
Validate issues before reporting
Exam tip:
If an auditor identifies a potential control weakness, the first action should be: Gather additional evidence to validate the finding. Do not report immediately without evidence.
Compliance Testing vs Substantive Testing
Testing Type
Purpose
Compliance testing
Determines whether controls, policies, or procedures are being followed
Substantive testing
Tests transactions, data, or balances in detail to verify accuracy/completeness
Evidence Quality
Audit evidence should be:
Sufficient — enough evidence
Appropriate — relevant and reliable
Reliable — dependable source
Relevant — directly related to the audit objective
If the question says potential finding, suspected issue, or possible weakness, the best answer is usually: Perform additional testing / gather more evidence
Phase 3: Documentation
Audit documentation records the work performed and supports the auditor’s findings, conclusions, and recommendations.
Key Contents
Audit objective and scope
Audit program
Procedures performed
Evidence obtained
Test results
Findings
Conclusions
Recommendations
Management responses
Follow-up actions
Use of experts, if applicable
Exam tip:
The primary purpose of audit documentation is: To support audit procedures, findings, and conclusions.
Audit work papers are important because they provide a link between: Audit objectives → Audit procedures → Evidence → Findings → Final report
Audit documentation does not replace testing. It supports the audit work already performed.
Phase 4: Reporting
The reporting phase communicates audit results to management and relevant stakeholders.
Key Activities
Draft audit report
Validate findings
Discuss findings with auditee management
Confirm factual accuracy
Obtain management responses
Include recommendations
Issue final audit report
Communicate risk and business impact
Final Audit Report Usually Includes
Audit objective
Scope
Summary of work performed
Findings
Risk/impact
Recommendations
Management responses/action plans
Target remediation dates, if applicable
Exam tips:
Before issuing the final report, the auditor should: Discuss findings with auditee management. This helps confirm factual accuracy and obtain management responses.
If management disagrees with a finding or impact rating, the auditor should: Explain the significance, risk, and effect of not correcting the weakness
If disagreement remains, the auditor may document management’s disagreement in the final report.
If management corrects a weakness during the audit, the auditor should: Include the finding in the report and mention the corrective action taken
Do not exclude the finding just because it was corrected before the final report.
Reporting should not happen until the finding is supported by sufficient and appropriate evidence.
Phase 5: Follow-up
The follow-up phase determines whether management has implemented corrective actions and whether those actions effectively address the risk.
Key Activities
Track agreed corrective actions
Verify implementation
Test whether the new or changed control is operating effectively
Assess residual risk
Report unresolved issues
Escalate overdue or ineffective remediation when appropriate
Exam tips:
The follow-up phase is primarily performed to determine whether: Management implemented corrective actions
Do not accept management’s statement alone.
A control existing on paper does not mean it is operating effectively.
The auditor should go one step deeper and verify not only implementation, but also effectiveness.
If management states that an issue has been fixed, the auditor should: Verify implementation through testing or review.
If management implemented the recommended control but it is not operating effectively, the auditor should: Report that remediation is incomplete or ineffective,
Exam Mindset
For Audit Phases questions, CISA is not just testing memory. It is testing professional audit judgment.
Always ask yourself:
Is this still planning, testing, reporting, or follow-up?
Does the auditor have enough evidence?
Has management been given a chance to respond?
Has remediation actually been verified?
Is the response risk-based?
Final Exam Mantra
Plan based on risk → Find evidence through testing → Document everything → Report accurately → Follow up until remediation is verified.