Dear Fabio & Girish,
Excuse my delay.
Fabio,
I just worked out on your given data sample - so the transaction, MII allows you to place to your logic in your Query, Transaction, XSL or in your JavaScript.
To make the output more readable I can just multiply "Local.RangeLimit" by the Calculated "Range" column from the above mentioned expression.
Another complex development that you could use to derive your required output may be to,
1. Generate your SPC values out of a custom transaction employing MII's SPC Action blocks
2. Custom chart with bar and line chart for displaying the values.
I agree with your thought (out of my personal experience) - MII SPCCharts are not completely equipped when compared to Minitab & other SPC tools. But that's were MII's development tools comes to your aid like above.
When you want such specific requests to be addressed by SAP tech support, the usual reply you get will be a re-direct to their consulting department.
Who will consult you with a similar walk through using possible MII work-arounds. Good luck with that.
With regards,
Ponilango P