The purpose of this standard is to provide basic principles and guidance to demonstrate the qualification of equipment. Qualification is intended to confirm the adequacy of the equipment design to perform its required function or functions over the expected range of normal, abnormal, design basis event, post design basis event, and in-service test conditions.The purpose of this standard is to provide basic principles and guidance to demonstrate the qualification of equipment. Qualification is intended to confirm the adequacy of the equipment design to perform its required function or functions over the expected range of normal, abnormal, design basis event, post design basis event, and in-service test conditions.