PTF and exception message help

We run an unconstrained plan. Thinking of setting the PTF for a parent at Cumulative MFG Lead Time and the child components at Total Lead Time. From a plan stability perspective this lays out nicely. For in today’s world with a user defined PTF fixed across all items the components are never released on time.  However if we go with LT’s at the PTF now we need to have a way to identify exceptions easily. In my test environment I set a safety stock value inside the parent PTF. How to see that while the PTF is playing nicely for