Having selected Sort WOs by Start Dates from WO Scheduling menu in Process Work Orders activates function which sorts WOs by start dates in individual WOs. Work orders sorted by using this function are recorded in column Line of the WO table. You can change it manually at a later point or use it to display work orders and as well as serving as a list of WOs to be processed. It can also be used as input data for sorting WOs by available dates.

Below you can observe WO table prior to performing the function Sort WOs by Start Dates:
and after it completes:

 In order to decrease average delay time in processing WOs it is wise you create WOs as sorted by the function Sort WOs by Start Dates.