See user's point #3 of https://skyline.ms/announcements/home/support/thread.view?rowId=53519
(other points are split into other issues)
"When we tried to export the method as Method type = "Scheduled", the only options are to use the average retention time, or use the retention times from a certain replicate. We were wondering if there was a way to instead use the defined explicit retention time for the compound instead of basing the RT on files that are open, or if this could be considered as a feature in a future release. This is especially helpful when we are using Skyline to process hundreds of MRMs and determining the compound RTs out of many different data files with different standard mixes (where some will include the compound and some will not)."