Goal of a study is to find control space of four factors so that three responses are within specification. In the profiler simulator first I used the defect profiler to check the impact of the factors on the defect rate given in the upper graph below. Then I used the design space profiler shown in the lower graph: results for minimum defect rate are different, why? I accept the control ranges of the design space profiler but why are first esimations of the minimal defect ranges by the defect profiler, different?
