Post-Implementation Review: What to Evaluate
Understand the purpose and scope of post-implementation reviews and their significance for CISA exam preparation.
A post-implementation review (PIR) is a formal assessment conducted after a system has been deployed and stabilized. Its purpose is to evaluate whether the project achieved its objectives, delivered expected benefits, and identify lessons learned. For CISA candidates, understanding PIR is essential because it closes the project lifecycle and provides accountability.
When to Conduct a PIR
A PIR should be conducted after the system has been in production long enough for meaningful assessment, typically three to six months after go-live. Conducting the review too early may not capture the full picture, while waiting too long may make it difficult to recall relevant details or take corrective action.
Key Areas to Evaluate
Business Objectives and Benefits
The PIR should assess whether the system achieved the objectives defined in the original business case. This includes:
- Comparing actual benefits (cost savings, efficiency gains, revenue impact) to projected benefits
- Identifying benefits that were not realized and understanding why
- Determining whether additional benefits were achieved beyond initial expectations
Project Performance
Evaluate how well the project was executed against its plans:
- Actual versus planned budget, including an analysis of variances
- Actual versus planned timeline, noting any delays and their causes
- Scope changes and their impact on cost and schedule
- Quality metrics, including defect rates and system stability
System Performance
Assess the technical performance of the deployed system:
- System availability and uptime against service level targets
- Response times and performance under actual workloads
- Number and severity of production incidents since go-live
- User satisfaction with system functionality and usability
Lessons Learned
Perhaps the most valuable output of a PIR, lessons learned capture what worked well and what should be improved for future projects:
- Effectiveness of the development methodology and project management approach
- Quality of requirements gathering and stakeholder engagement
- Adequacy of testing and conversion processes
- Effectiveness of training and change management
Audit Considerations
IS auditors should assess:
- Whether PIRs are conducted as a standard practice for all significant IT projects
- Whether the review includes input from all relevant stakeholders (business users, IT, project management)
- Whether findings and recommendations are documented and communicated to appropriate management
- Whether lessons learned are incorporated into organizational standards and future project planning
- Whether corrective actions are tracked to completion
Common Audit Findings
- PIRs not conducted at all, often because resources move to the next project
- Reviews that focus only on technical aspects without evaluating business benefit realization
- Lessons learned documented but not shared or applied to future projects
- PIRs conducted by the project team without independent perspective
CISA Exam Tips
The exam may ask about the primary purpose of a PIR or what an auditor should recommend when a PIR is not conducted. The key message is that PIRs provide accountability for project investments and generate organizational learning. Without them, organizations risk repeating the same mistakes and cannot verify whether IT investments delivered their promised value.