Hi! You can make ACW discretionary also! There wouldn't be a limit. We used to use this in our organization. The downside is that agents could stay in ACW unnecessarily to prevent getting another interaction; however, if you have a lot of complicated issues, the reward may outweigh the risk. Another thing is that if agents don't wrap-up their last interaction of the day before leaving, it clocks ACW overnight and creates peaks in your handle time forecast that you'll need to adjust.
We created a metric using agent total ACW time from the Performance reports divided by total scheduled On Queue time from the Historical Adherence report to monitor and coach based on those with abnormally high percentages of ACW. We've since changed to the time-boxed ACW because the majority of our interactions don't require a lot, but if you're consistently needing more than the max time, discretionary may be the way to go.

------------------------------
Angela Robinson
Senior Workforce Management Analyst
Alcon Vision LLC
------------------------------