What is the key performance indicator (KPI) that directly measures the availability of a critical piece of medical equipment?

The key performance indicator (KPI) that directly measures the availability of a critical piece of medical equipment is its uptime percentage or availability rate. Uptime is the amount of time the equipment is functioning and ready for use, expressed as a percentage of the total time it should be available. For example, if a critical piece of equipment, such as an MRI machine, is required to be operational 24 hours a day, 7 days a week (168 hours), and it experiences 4 hours of downtime due to maintenance or repairs, its uptime is (168-4)/168 = 97.6%. A high uptime percentage indicates that the equipment is reliable and well-maintained, whereas a low uptime percentage signals potential problems with maintenance practices, equipment reliability, or resource allocation. Uptime is directly related to other KPIs like Mean Time Between Failures (MTBF) and Mean Time To Repair (MTTR), but availability is the metric that most directly reflects whether the equipment is ready to perform its intended function when needed. Monitoring uptime trends allows facility managers to proactively address potential issues and improve equipment performance.