This article examines the pivotal role of in-process testing within cGMP-compliant biotech manufacturing. Discover how continuous monitoring supports Quality by Design (QbD), minimizes deviations, and enhances consistency—ensuring safe, high-quality cell and gene therapy production in today’s increasingly regulated and precision-driven therapeutic landscape. https://hackmd.io/@GKXQOi4CSbaLiqqEf1w96w/SJrBsjLXeg