How FTE variation works?

babynus wrote: There's nothing wrong with your configuration, it's about undestanding what variation of capacity is.
It does not change duration of a day, so that a full work day is now half a day.
Moreover it won't impact real work entered.
It is just a way to plan the resource with a different capacity than usual one.
For exemple if you need the resource to work for extra time every day to cover some extra work during a period.
It can also be (for covid period) that the resource will be planned only half days during the period.
But it's only for planning, it won't have any effect on real work entered. It will just point out in timesheet that only 0,5 day is expected (sum for day is green when sum entered is 0,5), but resource is always able to enter more (or less) to reflect what he really worked.