The risk criterion is divided into five categories: clinical function, physical risk, problem avoidance probability, incident history, and regulatory or manufacturer requirements. Devices are given a score for each of these categories. The scores for each category are added up and a total score is given for each device type. Maintenance strategies are determined based on the total score. A combined score of 12 or more is justification for semiannual testing, a score of 9-11 is justification for annual testing, and a score of 8 or less is justification for less than annual testing, either bi-annual or no scheduled testing, depending on clinical application. The result is a
more cost-effective test program that will result in improved patient care through less equipment downtime and more money for direct patient care activities.