This article discusses how comparability protocols provide structured, pre-approved plans for managing postapproval chemistry, manufacturing, and controls (CMC) changes while ensuring product quality. These protocols explain the scientific rationale for the proposed change, outline the analytical strategy to demonstrate comparability, define the acceptance criteria, and specify the recommended reporting category. The use of comparability protocols aligns with the principles outlined in International Council for Harmonisation (ICH) guidelines, which stress risk-based decision making and strong lifecycle quality management. This article also discusses the advantages and limitations, differences between the US Food and Drug Administration (FDA) and European Medicines Agency (EMA) approaches, and practical implementation considerations for comparability protocols.