However, I don't think we have a suitable IMS metric being created by Skyline at the moment. Unless you know of a value you can see in Skyline reports that you want to track. There is currently no IMS Error value. Nor does Skyline have a per-run estimate of the observed IMS value (inverse mobility or CCS). Though, these things have been requested.
This may be a little confusing. I see that Skyline has the report values:
Precursor Results.Collisional Cross Section
Precursor Results.Ion Mobility MS1
Precursor Results.Ion Mobility Fragment
Precursor Results.Ion Mobility Window
Precursor Results.Ion Mobility Units
These values are essentially all prediction values. The Collisional Cross Section value would typically come from a library, and the MS1 and Fragment values would get calibrated based on a function provided by the instrument vendor, but these are all still about where Skyline extracted signal from the spectra. There is currently know information in the report about observed signal in the IMS dimension, the way that Mass Error works in the m/z dimension.
Am I making sense? I think you would need to wait for the Skyline Team to implement some kind of Ion Mobility Error or Observed Ion Mobility [value] fields to have something to track.