I've had a few people ask, so I'm going to post this here... We track the time that a project is in Create Execution. Business Review is the status that indicates Creative Execution is complete for us, so we have 3 calculated fields on the task form. We also use this task on a Kanban board and the task status changes as that task moves across the board. - Creative Execution Start Date IF(Status='CIA',IF(ISBLANK(Creative Execution Start Date),$$NOW,Creative Execution Start Date),Creative Execution Start Date) -- formatted for date/time -- CIA is the key code for our Creative Execution status note: since the calculation for this field (and the next field) references itself. I had to create the field, save the form, then go back into the form and add the calculation. - Business Review Start Date IF(Status='YVX',IF(ISBLANK(Business Review Start Date),$$NOW,Business Review Start Date),Business Review Start Date) -- formatted for date/time -- YVX is the key code for our Business Review status - Creative Execution Cycle Time ROUND(WORKMINUTESDIFF(Business Review Start Date,Creative Execution Start Date)/480,3) -- 480 is the minutes in an 8-hr work day, 3 indicates rounding to 3 decimal points.