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Feb 21, 2012 7:23 AM
(11332 views)

I assume I am missing something very obvious, but I am at a loss as to how to create a gauge study. Minitab has a command to "Create Gage R&R Study Worksheet." Is there something analogous in JMP? I want to enter the number of parts, opers, repeats, etc., and have JMP create a table so I know what experiments to run and in what order. (I found how to analyze such a table, but not how to create one.)

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You could use the DOE platform to create the gage study table and then use a Col Shuffle formula to randomize the parts within the parts column.

When creating the DOE matrix (i.e. the gage study table) represent each part by a number (1,2,3,...) then do the following:

1) Add a formula to the *part* column (right click on column header --> select Formula).

2) Once the formula menu is opened, in the function list select "Random", a list will open

3) From the list select "Col Shuffle" (down towards bottom of list)

4) Click on the **Apply** button and you will see your *part* column randomize before your very eyes.

Creating a formula: http://www.jmp.com/support/help/Create_a_Formula.shtml

Col Shuffle: http://www.jmp.com/support/help/Random_Functions_2.shtml

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I don't think JMP has a canned way to do this the way that Minitab does. As I recall, I have had to design a full-factorial with the number of levels I wanted for parts, operators, etc., using randomization when creating the actual table, but it's been a while since I last did this.

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Creating a Gauge R&R

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Re: Creating a Gauge R&R

Yes, JMP is quite capable of building a full factorial Gauge study with replicate runs. Its under the DOE tab in the menu bar, under Full Factorial Design. Very easy to use.

-B

JMP Systems Engineer, Pharm and BioPharm Sciences

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Re: Creating a Gauge R&R

Yes, but for some reason a full factorial in JMP only offers 9 levels. The typical recommenation for a Gage RR study is 10 parts, 2-3 operators and 2 repetitions. (AIAG, 2003).

9 or 10 shouldn't really make a difference if not my company had it as a standard. So I have to use 10 and set up the table manually...

It seems to me that I should be able to use a Customized DOE, but I can't control the table layout (I'm new to JMP I should say). I want the table to be set up randomly with respect to parts and repetitions, but ordered with respect to operators. Is that possible?

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Re: Creating a Gauge R&R

JMP 11 will allow more than 9 levels for categorical factors in a Full Factorial design.

-Jeff

-Jeff

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You could use the DOE platform to create the gage study table and then use a Col Shuffle formula to randomize the parts within the parts column.

When creating the DOE matrix (i.e. the gage study table) represent each part by a number (1,2,3,...) then do the following:

1) Add a formula to the *part* column (right click on column header --> select Formula).

2) Once the formula menu is opened, in the function list select "Random", a list will open

3) From the list select "Col Shuffle" (down towards bottom of list)

4) Click on the **Apply** button and you will see your *part* column randomize before your very eyes.

Creating a formula: http://www.jmp.com/support/help/Create_a_Formula.shtml

Col Shuffle: http://www.jmp.com/support/help/Random_Functions_2.shtml