If you'd like to utilize it for scheduling then You will need a industry from the tblEquipmentCalibration to point if the next calibration is scheduled based only on the calendar (say 1 yr from last day of scheduled calibration) or a person 12 months from last calibration (genuine calibration actions http://knoxmgwmc.blogsmine.com/1687187/new-step-by-step-map-for-calibration-tracking-software