You hopefully already know that a fully grown tree (major) is giving u more stuff out of the log when carpenting with it.
But when you got your log you dont really know how far you can go and carpent stuff out of it. 1 building log? maybe not even one if theres already some boards cut out!
Heres my suggestion; either you should see the progress of the used log or you should be able to inspect the log too and see how much % its wasted of it already. So you can guess easier how much you can still get out of it.
I think some ppl are tired of the message;
"You have failed to make something productive out of it!"