Measuring productivity for comparison requires the tasks under observation to be comparable. This may be good for laying bricks or bailing hay, but it is terri

Measuring productivity for comparison requires the tasks under observation to be comparable. This may be good for laying bricks or bailing hay, but it is terrible for designing solutions to problems requiring the problem to be defined as part of the task (except in the very broadest sense to gauge the effectiveness of the estimation process, not the "work" itself).