Quality Assurance is a process of ensuring that products and services meet certain standards of quality. Quality Assurance is often used in manufacturing and other industries to ensure that products meet certain standards of quality before they are released to the public. WARRANTY is a guarantee given by a manufacturer or seller to a customer that a product will be free from defects for a certain period of time. Quality Assurance and WARRANTY are related in that Quality Assurance is used to ensure that products meet certain standards before they are released, while WARRANTY is a guarantee given to customers that the product will be free from defects for a certain period of time.