Yes, for us, in our situation (work at home), I felt the need to include even our family stuff - so for *us* this work plan was really more of a "family planner" for the week. Most families just need a work plan for the school hours; but this kept us organized in all areas ;)
And no, I didn't make a huge deal of him not finishing a particular day's works if he was working deeply. If I didn't see him truly working, then I would comment that he chose not to work well that day, it would mean more work the next day.
(note: if you've not quite noticed yet, I'm a single mom; while what I just said above might sound a bit "harsh" to some, the fact is, I have to provide a lot of that "boundary" stuff in a way that doesn't come natural to me; by having just such conversations as I just now mentioned, my son is aware of his boundaries, aware of the consequences both good and bad, and it is really starting to show through his work on the tae-kwon-do STORM team - a bragging post for another day ;) ).
Definition of true work: diligence, depth, interest (even if the interest is a "requirement"), appropriate breaks as needed.