Verification and validation have an association but with some important differences.It is important to look into Verification and Validation in the early stages of design which is when developing required specifications for the product. Design Verification is a process that checks if the output conforms with the input and verification is conducted at all levels of medical device design. Validation however makes sure that the user needs and intended uses are met. Validation follows verification and is possible only after the finalized design and the device is built.