QA vs QC
QA is the planned system for preventing quality problems; QC is the inspection and testing work used to verify installed work meets requirements.
Key differences
| Point | QA | QC |
|---|---|---|
| Timing | Before and during the work as a planned system. | During and after installation as verification. |
| Focus | Process quality. | Installed work quality. |
| Outputs | Plans, checklists, mockup requirements, and procedures. | Inspection reports, test results, and deficiency logs. |
Example in context
A QA plan may require a facade mockup; QC confirms the installed facade matches approved details and performance requirements.