X bar and R Chart
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- This topic has 2 replies, 3 voices, and was last updated 16 years, 9 months ago by
Akram.
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August 17, 2005 at 7:02 am #40389
Hi All,
Can I use X bar and R chart to make sure the tester produce measurement corectly for each parts that operator measured?
Your suggestion and advise are appreciated.
Thanks
0August 17, 2005 at 7:30 am #125204Hi BG,
You can use any variable control chart that is fit for purpose, however, you need to make sure the ‘testers’ can actually measure correctly, for that reason you need to conduct MSA, variable gage RnR, if unsure about how to do it / what is required, check out this website.
Use the Anova method as opposed to the Xbar & R while conducting the gage RnR, it is more accurate & considers the interaction between the part & the operator.
hope it helps.
J0August 17, 2005 at 7:36 am #125205BG,
The types of control charts used to monitor quality depend on the nature of the data gathered. Monitoring the production of parts that just either good or bad is different than monitoring specific CTQ ( such as length, weight ) on a part. In other words, the type of control chart will depend on whether the data gathered are attribute, variable or multivariate.
In the example that you have given, since you are talking about measurement, you should be able to use the X-bar and R charts.
try http://www.sixsigmafirst.com/controlcharts.htm
hope this will help
Akram Al-Qiram0 -
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