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PM-related safety

From HTMcommunityDB.org

A device's PM-related level of safety and priority for PM is determined by combining the projected worst case severity of the outcome of a PM-related failure and the projected or demonstrated likelihood that the failure will actually occur.

The Task Force has defined the following five levels for a device's priority for timely PM. (See Table 12)


  • PM Priority 1. Devices with poor PM-related reliability (those "quite likely" to have a PM-related failure) that could result in a serious, life-threatening injury (LOS 3)


  • PM Priority 2. Devices with good PM-related reliability (unlikely to have a PM-related failure) that could result in a serious, life-threatening injury (LOS 3) , and
Devices with poor PM-related reliability (quite likely to have a PM-related failure) that could result in a less serious, non life-threatening injury (LOS 2)


  • PM Priority 3. Devices with very good PM-related reliability (very unlikely to have a PM-related failure) that could result in a serious, life-threatening injury (LOS 3), and
Devices with good PM-related reliability(unlikely to have a PM-related failure) that could result in less serious, non life-threatening injury (LOS 2), and
Devices with poor PM-related reliability (quite likely to have a PM-related failure) that could result in no injury, but a threat to disrupt patient care (LOS 1)


  • PM Priority 4. Devices with very good PM-related reliability (very unlikely to have a PM-related failure) that could result in a less serious, non life-threatening injury (LOS 2), and
Devices with good PM-related reliability (unlikely to have a PM-related failure) that could result in no injury, but a threat to disrupt patient care (LOS 1)


  • PM Priority 5. Devices with very good PM-related reliability (very unlikely to have a PM-related failure) that could result in no injury, but a threat to disrupt patient care (LOS 1)


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