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Robert Ballard commented on the post, Getting the Most out of a Capability Analysis 6 years, 5 months ago

The calculations of control limits uses a different estimation of the standard deviation than the standard deviation calculated by hand (or Excel function). This is to reflect that the sample size is usually small and therefor an estimation of long term variability is needed. Shewhart’s Table of Constants was developed to account for the…[Read more]

Robert Ballard commented on the post, How to Avoid The Evils Within Customer Satisfaction Surveys 9 years, 2 months ago
Excellent article. Whenever I am on a call with customer service I’m often asked if I would like to take a followup survey., typically prior to the actual communication with the agent. I always indicate that I […]

Robert Ballard commented on the post, How to Avoid Common Mistakes in Linear Regression 9 years, 5 months ago
Very good article and explanation of the mistakes that are often made in regression models. Another mistake that is often made is ignoring the residuals and understanding why certain data do not fit the model. […]

Robert Ballard wrote a new post, Getting the Most out of a Capability Analysis 10 years, 7 months ago
The process capability indices Pp and Cp describe how closely a process can operate within its specification limits. Many articles describe the difference between Pp and Cp simply: one is short term, one is long […]

I concur with MBBinWI. The “safest” approach is to include all operators in the Gage R/R study. The next best option to obtain a statistical evaluation of measurement error is to conduct a Range study. This method can be found in the AIAG manual. The range method will allow you to evaluate either Repeatability OR Reproduceability. You could…[Read more]

Robert Ballard and are now friends 10 years, 11 months ago

Robert Ballard and are now friends 10 years, 11 months ago

Piggy backing off of Eric’s response, once you have reformatted the column you can use Excel’s vlookup function to find matches. You can also use Minitab using the Data/Code/Use Conversion Table. This is Minitab’s version of Excels vlookup function.
Feel free to message me and I will walk you though it. It’s doable. 10 years, 11 months ago

Robert Ballard changed their profile picture 10 years, 11 months ago

Robert Ballard became a registered member 10 years, 11 months ago