Hello, Yeah that's the trick, how do you tell WF what you expected the duration to be? You'd have to use the Baseline Planned Completion Date or create a Field (on a Project Form) called Expected Planned Completion (or whatever you choose). Then you can do some calculations. I was thinking a Project Report using the DATEDIFF ( DATEDIFF(date1, date2)) with the Start Date and the Planned Completion Date. Call that X. Then a DATEDIFF with the Start Date and the Baseline (or Expected) Planned Completion Date. Call that Y. Then a calc of (X – Y) / Y gives you the percentage. And highlight anything greater than or equal .25. I haven't tested it, but I believe that is correct. Of course if Workfront's Schedule Performance Index (SPI) worked properly, it'd be easy. Anything with an SPI less than or equal .75 would be your trigger.