I know everyone wants to judge productivity instead of hours per week. But, I feel that 40 hours per week is a reasonable amount to request and that MOST (not all) employees are better managed by an hour standard instead of a productivity standard (which is hard to measure anyways). All of my employees work from home and at first I was all about judging by productivity, but then I realized it was being abused for the most part and that if I set rules for timings and hours worked, it would be simpler and easier, at least for now.