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May 21, 2018 3:12 PM
(3623 views)

Hello - How can I read-in spec limits when I check "capability" in the IR chart builder?

Analyze > Quality and Process > Control Chart > IR

I have successfully read-in spec limits when studying process capability (Instructions here:https://community.jmp.com/t5/JMPer-Cable/3-ways-to-load-your-specification-limits-into-Process-Capab...) but it appears to need different input when the data are stacked.

Thanks in advance,

Tim

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If you split the data table by the "By" column(s)

Tables==>Split

into separate columns, you can then apply the spec limits independently to each of the new columns by using the

col<<set property("Spec Limits", {USL(xxx),Target(xxx),LSL(xxx)});

Jim

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Re: How to Get Limits for Capability on IR Control Chart

You were a bit unclear as to how your specification limits are stored. You mention that your data is stacked which I assume means you are using a By variable in your analysis. Below is some general IR chart code that you can use with a by variable and specification limits.

```
Control Chart(
SendToByGroup( {:Label == "height"} ),
Group Size( 1 ),
KSigma( 3 ),
SendToByGroup(
{:Label == "height"},
Chart Col(
:Data,
Individual Measurement,
Moving Range
),
Capability(LSL(50),Target(60),USL(70));
),
SendToByGroup(
{:Label == "weight"},
Chart Col(
:Data,
Individual Measurement,
Moving Range
),
Capability(LSL(60), Target(70), USL(80))
),
By( :Label )
);
```

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Re: How to Get Limits for Capability on IR Control Chart

Thank you Tonya. My spec limits are stored as in their own table (picture attached).

And you are correct, I am using a By variable since data is stacked. Is there a way to use the "Get Limits" button to pull in the spec limits under this scenario? It seems with using the code I would still be manually inputting the limits.

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If you split the data table by the "By" column(s)

Tables==>Split

into separate columns, you can then apply the spec limits independently to each of the new columns by using the

col<<set property("Spec Limits", {USL(xxx),Target(xxx),LSL(xxx)});

Jim

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Re: How to Get Limits for Capability on IR Control Chart

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Re: How to Get Limits for Capability on IR Control Chart

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Re: How to Get Limits for Capability on IR Control Chart

That's a helpful clarification, thank you.