Depending on the original activity type, service order country, weekday, start and end time, duration from and duration to, factory calendar an activity type and a/a type is determined for posting CATS entry / IW41 from FSM time-effort. When crossing end time, it is automatically split into several postings. The empty activity type, country is used for undefined origin activity types. If the field DuratSOpt is filled either with Person or Order any entry beyond the standard entry time (mostly 8 hrs) will be split as well and the overtime will receive a surcharge as explained in /PACG/ECM_VWRKTC - Work Time Task Definition.