Sam's clients strongly believe that they should not be paying for more than 45 hours of associate work on these documents. However, the firm's management team believes that spending less than 25 hours indicates either (i) associates are re-using too many assets from previous work and not tailoring the solution to the client or (ii) the team has not developed big or creative enough ideas for the project. Therefore, Sam has set the upper and lower design specifications to be 45 and 25 hours respectively.
What metric would you use to determine if the current process is capable?