Control Chart Builder

[#1]

Hi all,

Attached are two control charts but the second one is changing point 1 statistic to average instead of individual when i try to graph it. the data is identical a date and a numerical value. what is even weirder is that i got it to work for one data set but not for another. both data sets are a date and numerical value does anyone have a solution for this?

[#2]

I have my doubts about your data being identical. If you have groups in your data (multiple values on same date in your case) JMP will use aggregation with control chart builder.

All values unique for Column 7

One "duplicate" value

[#3]

The first chart is an "IMR" chart, and the second is an "XBar&R" chart. See: Shewhart Control Charts for Variables.

JMP will default to the XBar type if there is more than one measurement per date, as @jthi pointed out. The rows where Range is nonzero would be an interesting place to spot-check whether the data tables are identical. 

Here is a nice explanation of the different types of Control Charts, when to use them, and how JMP decides which format to use: SPC, MSA and Process Capability Training | JMP