Systems and methods related to the field of cardiac resuscitation, and in particular to devices for assisting rescuers in performing cardio-pulmonary resuscitation (CPR) are described herein. A method for managing cardiopulmonary resuscitation (CPR) treatment to a person in need of emergency assistance includes monitoring, with an electronic medical device, a parameter that indicates a quality level of a CPR component being provided to the person by a user； determining, with the electronic medical device, that the parameter indicates that the quality level of CPR being provided is inadequate； and providing, to one or more rescuers of the person, an audible, visual, or tactile indication that a different person should perform the CPR component.
