Data integrity refers to the completeness, correctness, consistency, and accuracy of data throughout its entire lifecycle. It is critical for the reliability of data used in regulated industries like pharmaceuticals and medical technology. Data integrity ensures that data is trustworthy and traceable, which is essential for regulatory compliance and for the safety and efficacy of products. It is a key component of the quality assurance system and is mandated by many guidelines and standards as the foundation for compliant quality assurance.