"one engineer working 80 hours a week is significantly more productive than two engineers working 40 hours a week" Similar in medicine doctors (hospitalists in

"one engineer working 80 hours a week is significantly more productive than two engineers working 40 hours a week" Similar in medicine doctors (hospitalists in particular) will work 12 hour shifts because of "continuity of care" which is better for the patient - to not be passed between two doctors.