Siebel Field Service Guide > Preventive Maintenance > Preventive Maintenance Triggers >
A Threshold trigger activates a PM Plan when a reading from an asset exceeds a set value. Threshold triggers can fire in response to a change in a binary value; for example, a threshold of 0.5 would trigger a PM plan when an on/off alarm changes state.
Threshold triggers examine the readings since the most recent PM action. If any completed reading exceeds the lower or upper limit, the trigger fires.
Like Usage triggers, Threshold triggers specify a measurement type to which they apply. The same potential issues and solutions for Usage Triggers apply to Threshold triggers.
Measurements and Readings
Measurements are defined for products on the Administration - Product screen > Service Information > Measurements view. For more information, see Setting Up Use Plans.
The Measurements view on the Assets screen associates measurements from a product with the selected asset. The view allows these measurements to be customized for this asset. For example, a relevant measurement for a copy machine would be the number of copies, read from a counter; for a car it would be the distance traveled, read from an odometer; and for a pump it might be oil level, oil, pressure, and temperature, read from gauges. For more information, see Measurements View.
The Readings view on the Assets screen allows a technician to record the readings for specific measurements and specific assets. These readings may act as triggers for usage and threshold triggers.