Do you want to test the productivity of programmers with FizzBuzz or writing an OS from scratch? The distribution of productivity amongst engineers is probably

Do you want to test the productivity of programmers with FizzBuzz or writing an OS from scratch? The distribution of productivity amongst engineers is probably going to vary depending on the complexity of the task. Some tasks I would expect the top performers to be far better than 10x at. And not all top performers are equally suited to each task. Additionally this idea of measuring productivity purely by problem solving ability is nonsense as engineers are hired also based on their ability to write maintainable code and to work as a team, etc.