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View Full Version : Gage R sheet - Can someone make sense of this data?


MasterBB
2nd August 2005, 08:26 PM
Can someone make sense of this data. The parts that are measured in A are not the same parts measured in B.
Re: Nested gage R R

Thanks in advance.

Jim Wynne
2nd August 2005, 11:42 PM
Can someone make sense of this data. The parts that are measured in A are not the same parts measured in B.
Re: Nested gage R R

Thanks in advance.
What is it that you're trying to find out?

MasterBB
3rd August 2005, 09:06 AM
This is an evaluation of both machines A & B. I am trying to evalute an automated test equipments. The data shown are form 2 different machines & each part is measured 3 times at each machine. Non of the parts were tested in A were aslo tested in B.

Jim Wynne
3rd August 2005, 09:25 AM
This is an evaluation of both machines A & B. I am trying to evalute an automated test equipments. The data shown are form 2 different machines & each part is measured 3 times at each machine. Non of the parts were tested in A were aslo tested in B.

What is the specification (and tolerance)?
Are you using the same test equipment on two different machines?
What type of test equipment is it and what is is measuring?
You say first that the attachment "...is an evaluation of both machines," and then you say you're "...trying to evaluate...automated test equipments." I'm still not clear on what you're trying to accomplish--please provide more information, including what it is about the numbers you want to know.

MasterBB
3rd August 2005, 03:23 PM
1. Tolerance: LSL =5, USL =13
2. It's 2 machines within the equipment.
3. It's measuring efforts in lbs. of tracks used in drawers. You have Upper & Lower Channels & balls in between.

Thanks in advance.

Jim Wynne
3rd August 2005, 04:11 PM
1. Tolerance: LSL =5, USL =13
2. It's 2 machines within the equipment.
3. It's measuring efforts in lbs. of tracks used in drawers. You have Upper & Lower Channels & balls in between.

Thanks in advance.
I'm sorry, but you don't seem to have answered the questions, or made this any clearer to me. (I say the same thing to my wife frequently, so maybe it's me:D .
You answered #1 OK, but I don't understand your answer to #2, you only partially answered #3, and didn't answer #4 at all. Would you mind trying again?

MasterBB
3rd August 2005, 07:41 PM
#2: It's 2 machines (measuring devices) within the equipment.
#3: Measuring Efforts via load cells.

#4: No need to answer based on 2 &3.


Thanks,

Ali

Jim Wynne
4th August 2005, 09:16 AM
#2: It's 2 machines (measuring devices) within the equipment.
#3: Measuring Efforts via load cells.

#4: No need to answer based on 2 &3.


Thanks,

AliI'm going to take one last stab at this. Here's what I've got so far:

You're making drawer slides
You have two machines, and somehow each machine includes a gage or test fixture with load cells, and it's used to measure the force needed to...?
You have a spreadsheet with some readings, and you're looking for someone to help you "make sense" of them.

Please describe the test procedure in detail
Tell exactly what it is you're trying to find out. What do you expect the spreadsheet numbers to tell you?

Miner
9th August 2005, 11:44 AM
The data that you provided can be analyzed (see attached file). Since it was run as a nested study, you have to be careful in how you interpret the results.

The data will give you a fairly clear idea of the repeatability of the two test machines, but you will need to investigate why part #2 was out-of-control for the Range.

Because it is a nested study, you cannot separate the reproducibility (machine to machine) from the variability of the parts themselves. While the dot plot appears to show the two machines to be equal, this can be misleading. For example, the two machines could be quite different, but be offset by two groups of parts with different averages.

To truely answer these questions, the study should be redesigned, run and analyzed as a crossed study.