A testing laboratory is accredited to OECD-GLP or ISO/IEC 17025 quality system as a way to assure its capability to conduct testing and report valid and reliable results needed in making importance decision, including in risk assessment. However, often there is confusion, which quality system the laboratory should implement for its testing. Hence, I'm posting the below presentation, hope it gives some clarification on how these two quality systems work hand-in-hand from the perspective of medical device biocompatibility testing.