I am trying to implement complex and variable schedule events either using OpenStudio Variable Interval Schedule sets or by accessing underlying EnergyPlus Schedule:Day:List or Schedule:Day:File resources. I am able to use the IDF file generated by the OS run, manually modify the schedules to add a Day:List resource and assign it to an equipment load and successfully launch and run the case using EP-Launch. I have not tested the Day:File manual addition yet but believe it will also work. I am not able to import this modified IDF back into OS after it has been modified but may be using the import operation incorrectly. I am hoping there is a more streamlined method that could be applied in OpenStudio and take advantage of the UI and post processing. I am interested in how the Variable Interval Schedule that is present in the OS 1.6 library works or any other similar approach. I was not able to find any references to this or examples. Thanks