The following criteria may be associated with an asset type to trigger a PM activity:

• Perform N times on the M-th month: The activity is performed a user-defined number of times in a user-specified month.
• Perform after N days: The activity is performed after a user-defined number of days from the start date of the last PM activity.
• Perform after N days or M meter: The activity is performed either after a user-defined number of days from the start date of the last PM activity or when the difference between the meter reading when the PM activity was last performed and the current meter reading reaches a user-defined value (whichever occurs first).
• Perform after N Meter: The activity is performed when the difference between the meter reading when the PM activity was last performed and the current meter reading reaches a user-defined value.
• Perform after defect N score is below M or after K days: This activity is performed either after a user-defined number of days have elapsed since the start date of the last occurrence of the activity or the defect score is below a user-defined threshold.
• Perform on defined month: The activity is performed once in the user-specified month.

To associate one or more PM triggers with an asset type, follow these steps:

1. Open the Asset Types window.
2. In the right pane, locate the record for the asset type with which you will associate the PM triggers.
3. Right-click the record and select Edit PM Triggers. The system displays a dialog box where you enter the desired triggers.
4. In the dialog box, right-click and select Insert. The system inserts a record in the dialog box.
5. In the new record, click the down-arrow to display the list of PM triggers and select the desired PM trigger.
6. Repeat steps 4 and 5 for any additional PM triggers that will be associated with this asset type.
7. When all desired PM triggers are shown in the dialog box, close the dialog box by clicking the OK button.
8. Click the  icon to save the new information. The selected PM triggers will now be available in the trigger drop-down lists in the PM by Inventory and PM by Class Codes windows for this particular asset type.