[Andrei Demjanko]

Are we talking about the reports like the excerpt in the attachment?

I could be wrong, of course, but from this I can not see why the first column is not Soll.
It is interesting to note that the number in the first column is almost always equals the sum of numbers in the second and fourth columns. So, if the first column means authorized strength and the second means actual strength, the fourth column could mean Fehlen (lacking). The rare exceptions to the rule 1 = 2+4 could either be a typo or indicate the unit's uncertainity about the fate of the recently missing crews