What inspired this wish list request?
I want to load historical control limits in the same way I load spec limits. For quality / process engineering, I often want to plot Xbar/S data with both USL, LSL and historical UCL and LCL.
You should offer the option to batch load any type of limit (many are listed under column properties). USL and LSL should not be the only choice.
What is the improvement you would like to see?
I want to load historical control limits in the same way I load spec limits. For quality / process engineering, I often want to plot Xbar/S data with both USL, LSL and historical UCL and LCL.
You should offer the option to batch load any type of limit (many are listed under column properties). USL and LSL should not be the only choice.
Why is this idea important?
Important for your manufacturing and quality users.
This idea would greatly aid in the efficiency of process engineers working in the development phase of SPC. I would also expand this request to include the ability to import multiple control limits for the same output with some classification name of the limit variation. This would allow the different classification names to be selected from a column property menu (i.e. column property > control limit > chart type > *drop down classification*) to further aid in SPC development. When developing SPC for a process, we simulate the signaling rate under different conditions (i.e. different control limit scenarios). It is tedious to go into the column properties and change the limits for each scenario. I could also see this functionality being useful in the design phase if applied to the "spec limits" column property.
