The transition from Computer System Validation (CSV) to
Computer Software Assurance (CSA) is more than just a terminology change.
It reflects a shift in how we think about software validation especially during audits.
Earlier, the focus was largely on whether validation activities were executed as per defined protocols.
Today, the expectation is different:
How CSV Audits Traditionally Worked
CSV audits were heavily documentation-driven. Auditors typically reviewed:
- User Requirements Specifications (URS)
- Functional and Design Specifications
- IQ, OQ, PQ protocols
- Traceability matrices
- Testing and validation reports
- Deviation and defect logs
The emphasis was mostly on completeness and compliance of documentation.
What Changes with CSA
CSA brings a more practical and risk-based perspective. While documentation still matters,
the focus shifts towards understanding how decisions were made and whether the level of assurance is appropriate.
- Risk-based approach to validation
- Clear reasoning behind testing strategy
- Focus on critical functionalities
- Confidence that the system works in real scenarios
What QA Auditors Should Look For
1. Risk Assessment
- Is the system risk clearly defined?
- Is the level of validation aligned with that risk?
2. Decision Making
- Why was a certain level of testing chosen?
- Is there clear justification for reduced or simplified documentation?
3. Testing Approach
- Does testing focus on what truly matters?
- Are real-world scenarios considered?
- Is exploratory testing captured where relevant?
4. Vendor Reliance
- Is reliance on vendor testing justified?
- Has the supplier been appropriately evaluated?
Conclusion
CSA is not about reducing effort it is about applying effort where it matters most.
Reference: Guidance for industry and USFDA staff for Computer Software Assurance Production and QMS software, effective 03-Feb-2026