Your project is completed, you need to preformed a lessons learned or a root cause analysis. May be there are somee corrective and preventive actions you think need to occur. But how? What are the steps of a Corrective Actions and Preventive Action (CAPA) program  …  By following these 7 steps:

1. The Problem Statement
   Issues are identified by observation or formal testing. A written statement identifies the issue and any unique factors influencing the situation. The issue needs to be documented in a defined data collection system.
2. The Investigation
   Investigating in search of the root cause of an issue is often the first step in determining the solution. Asking “why” until the list of questions has been exhausted and all the questions have been answered can often discover the root cause.
3. Root Cause
   Root cause is defined as the most basic reason(s) for the presence of a defect, which if eliminated, would prevent recurrence. The Root cause is the outcome of the investigation and must be clearly documented.
4. Identify, Action Plan to correct or action plan to prevent
   Determine what process or product changes are appropriate to eliminate the root cause. Tools such as statistical analysis and the design of experiments may be required.
5. Validate and or verify the change
   Validate or verify all corrective actions and preventive actions to be sure they solve the issue – that is, the issue symptoms or any new issues do not recur. All changes need to be approved.
6. Implement CAPA – Effectively information
   Determine and document when and where the change is effective. For example, the effectively information could be a revision number, a date, or a serial number. Communicate to people involved with product or process to make them aware of these changes and to address training needs.
7. Verify effectiveness of the change – did it prevent recurrence of the defect?
   Verify that the change fixed the root cause. Finally yet importantly, document all the steps factually and completely. Records of findings and actions must be maintained and be retrievable through the product’s life. Auditors assume that if it was not documented, it was not done. Communicate findings to all who need to know.