Surface Finish Equipment MSA (Measurement System Analysis)

B

Black arrow

Hello,

We did a MSA with our Surface Finish equipment with following conditions:

3 operators
10 parts
3 repetitions

Ra-value was in focus.

But the results were not acceptable from % Tolerance & Study Var point of views. Before i send any resutl from this study i have to ask you all if there are any special advice when it becomes to surface finish and MSA?
 
L

lamkiu

Re: Surface Finish Equipment

This equipment is not have the repeatability factor, just have the reproducibility, so use the same standard to do crossed designed is useful.
3 operators
3 standard (the same or very similar)
2 repetitions
 
B

Black arrow

Re: Surface Finish Equipment

Hi,

What do you mean that this study do not have the repeatability factor?

3 Standard ? You mean use 3 surface references?
 
Ron Rompen

Ron Rompen

Trusted Information Resource
When reviewing your results, keep in mind that the test you are using is destructive. There are a number of threads here on doing MSA for hardness testers; I would suggest reviewing a few of those for some guidelines on how to interpret the results. I know it was helpful for me years ago.
 
L

lamkiu

Re: Surface Finish Equipment

Black arrow said:
Hi,

What do you mean that this study do not have the repeatability factor?

3 Standard ? You mean use 3 surface references?
Click to expand...

you can not test in the same point with this equipment because the test is destructive, so you need 3 surface references to reduce the variation
 
B

Black arrow

Re: Surface Finish Equipment

lamkiu said:
This equipment is not have the repeatability factor, just have the reproducibility, so use the same standard to do crossed designed is useful.
3 operators
3 standard (the same or very similar)
2 repetitions
Click to expand...


So does this mean that every operator measure on 3 pieces of references and repeats it twice?

Totally: (3x3x2 measurements) Is this mentioned in AIAG:s reference manual, concerning recomended procedure (operator, repetitions, parts) concerning MSA and destructive tests? such as measurings with surface equipments?
 
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