This would involve developing some sense of peak shape in the IM dimension, but we could probably start with something as simple as the comparing (IM at the maximum intensity point across the IM filter band at the peak in the RT dimension) vs (nominal IM of the ion).

John F at Agilent feels this is a highly useful piece of information.

Per JohnF, comparing against the IM value at the intensity center of gravity across the purple band is the way to go. Expressed as % error in IM and % error in CCS.