As Run chart displays values of Single result, SPC Control charts also Displays these reults with tolerance limit with Showing lines of uper and lower limit Tolerence. I have an issue while showing these lines .when i am doing result recording control charts Some times shows tolerance limit lines and some times not ? Kindly clarify me the SPC control chart process too?but my main question is that why SAP some times shows Results and sometimes not .
More over I already did all settings as below
Sapmling procedure with Fixed samples ,and SPC inspection crieteria,
Inspection plan -Inspection task list cahracterstics
MIC
Sampling proceudre -active
SPC - Active
Required Chrac.-Active
Single result -Active
Fixed scope -Active
All settings of number ranges is set
Control chart 115 -Shewchart X bar is using .