Calculating the Quality Capability Cp Value

The Statistics menu option Process > Quality capability Cp computes the Cp for all selected field quantities and a user-specified threshold value. For each selected quantity, a single result object is created. Each result object is a field vector that contains the Cp value at each mesh position.


Note:
  • Internally, the command computes quantiles, which requires at least 20 input samples.

  • The lower and upper bounds are user-specified values.


For Cp (scattering-oriented QCS):

where U and L denote the upper and lower bounds, respectively, and q(Yk,p) denotes the p-th quantile of quantity Yk.

The quantile probabilities correspond to the plus and minus -quantiles of a Gaussian distribution. Y denotes the quantity and k denotes the mesh position.