3.4 Evaluation and Decision

1. Design Space Studies
   This first of all, is a time to study the scope of the problem, and to obtain an understanding of the design space.
   Specifically, it is a time to determine the extent of the design space to be covered and to establish the number of design parameters of importance.
   • Make an estimate of the total range we need to consider in each of the design parameters.
   • Make a count of the number of functional constraints (equations) required to define the criterion function. Subtracting the number of fixed constraints, will give the potential number of degrees of freedom in the design and thereby the number of possible design parameters.
   • An initial reduction in the number of degrees of freedom can probably be made based on previous experience. But where there is any uncertainty a few calculations should be made to estimate the relative sensitivities of the criterion function(s) to the candidate parameters.
     
   • Degrees of Freedom
     establish the number of design parameters of importance. Make a count of the number of functional constraints (equations) required to define the criterion function. Subtracting the number of fixed constraints, will give the potential number of degrees of freedom in the design and thereby the number of possible design parameters.
   • Parameters Choice
     establish the number of design parameters of importance
2. select and justify candidate design parameters
3. make an estimate of the total range we need to consider in each of the design parameters

INCOMPLETE Under development