Design verification is important for ensuring the success of a medical device. It demonstrates that the product is safe ,designed correctly and design input meets design output. Design verification should start at an early stage when design input are developed. If process of proving that medical device is correctly designed starts at an early stage then Design output meets design input during the formal design verification. Design verification is an important part of regulatory submissions . Regulators needs the evidence that medical device is safe and satisfies all requirement. Spend more time in defining the design input so that design verification gets easier.