Example scenario: A piece of equipment needs to be calibrated every 30 days. A "30 Day Calibration" PM is created. Suppose today is the 15 of April. The calibration needs to be completed by the 30th. If the calibration is completed today, then the next "30 Day Calibration" PM will be set for May 15th. 

Select the calendar icon for the PM template.

Select the "Daily" option button and enter the select time interval. Then, click "Save."

Check the box for "Recalculate on PM completion."