J

I've been working for a while with SPC and have a few questions. First of all, I monitor an X-bar - R chart for a process. The subgroup size is 6. I have setup alarms for out of control points and significant shift (8 points above or below the center line per WECO rules). First question, I've been told that when a shift is noticed a statistical analysis must be performed to determine if there is statistical significance. How should I calculate the statistical significance? Do I have to use an Anova to compare the 8 subgroups that cause the shift with the center line/average and determine statistical significance?

Another thing is that I prepare reports of the results of the control charts. For every alert/alarm triggered I have to generate a report. Also, on a weekly basis, I have to analyze the results and assign actions to improve the deficiencies. In addition, I have to prepare quarterly reports that should provide a summary of the alerts and alarms that occur during the quarter. Any recommendations in regards to how reporting should be done? Any templates for SPC control chart reporting I can look to have a reference? Seems I can report biweekly the SPC data and not quarterly, but how can I justify this?