Another thing to consider (for software engineers at least) is hours per day, vs days per week. It can take a few hours to ramp up productivity and get in the

Another thing to consider (for software engineers at least) is hours per day, vs days per week. It can take a few hours to ramp up productivity and get in the zone. On the other hand, in a well organized team if a few people take a day or two off, not much would be lost.