A method, apparatus and system for optimizing the magnitude of reference levels in non-invasive imaging and analysis is disclosed. The method comprises assigning a position in a queue to the user according to one or more rules; determining contact information relating to the user which enables an agent to contact the user; and establishing communication between an agent and the user at the head of the queue using the contact information. The array of test contacts includes an active portion configured for electrically coupling with the corresponding pins on the integrated circuit device and an inactive portion adjacent to the active portion and electrically coupled to a reference signal on the printed circuit board. The method further includes determining, based at least in part on the determined scores, an action to take with respect to the electronic notifications.