我笑着哭DX8-04F-MultifactorRSM-IVopt.docx Rev. 5/17/10
The defaults for the runs are a bit more than the experimenter would like to run for lack of fit and replicates. To limit the number of runs, change the To estimate lack of fit – from 5 (by default) to 4. Also decrease the Replicates to 4. The
experimenter realizes this will decrease the robustness of the design, but decides that runs are too costly, so they need to be limited.
Lack of fit and replicates increased Press Continue to the response entry – leave this at the generic default of “R1” (we will not look at the experimental results). Then Continue on to build the optimal design for the constrained process space. At this stage, Design-Expert randomly chooses a set of design points called the “bootstrap.” It then repeatedly exchanges alternative points until achieving a set that meets the specifications established in the model selection screen.
The optimal design (builds may vary due to random bootstraps)
Design-Expert 8 User’s Guide D-Optimal RSM Tutorial 7
