For medical devices class II and class III are required to have post market surveillance. This is a required procedure for medical device companies to initiate to keep track of any complaints or device failure. Post market surveillance is necessary to keep track of consumer feedback, possible issues of the device, provide market research comparing the device to those in the market to see if improvements can be made to the device. In addition, post market surveillance also falls within regulatory because they are also interested in consumer feedback such as complaint tracking.