Trace a CQA back to the process
Identify a CQA, trace it to likely process drivers, and propose a control point.
Aggregates are trending upward near the release limit for a biologic, and the team is considering more final testing. CQA-to-CPP tracing: quality attribute -> process driver -> preventive control The common trap is late detection: adding final tests without controlling the process step that creates the quality risk. Step 1 Name the CQA: aggregate level is critical because it may affect safety, immunogenicity, and potency. A quality attribute is critical when variation can matter for the patient or product performance. Step 2 Trace likely process drivers: low-pH hold time, hold temperature, protein concentration, and post-purification handling. Do not jump from…
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