Beyond a simple FizzBuzz filter to screen out the truly bad applicants, it seems extraordinarily difficult to sort the rest. A probationary period (the norm in

Beyond a simple FizzBuzz filter to screen out the truly bad applicants, it seems extraordinarily difficult to sort the rest. A probationary period (the norm in many countries) theoretically can do this, but in practice I think it again only helps screen out the egregiously poor employees.