The R-Project
is continuosly evolving, and therefore it is very likely
that, if you have a different configuration that the one used during the
book production, you get unexpected results.
As we are also continuously applying R to Six Sigma, and improving the
SixSigma package, we will include here information and
code updates in
order to get the best of R for Six Sigma, and keep the book examples
running.
March 2016
SixSigma
package has been updated to version 0.9-3. Main changes:
-
Function
ss.rrupdated to comply with AIAG MSA manual. Thanks for the great feedback to Garry Kitchin. See my blog post for details. - Added non-linear profiles examples to package examples.
February 2016
SixSigma
package has been updated to version 0.9-2. Main changes:
- Functions for monitoring non-linear profiles
- Data sets for the example in the book "Quality Control with R"
- Some bug fixes and improvements
December 2015
The Book Quality Control with R. An ISO Standards Approach has been published in Springer Use R! Series. Visit the book's companion webpage for further information further information.
March 2014
SixSigma
package has been updated to version 0.8-2. Main changes:
-
Function
ss.rrnow allows one single appraiser and accepts the sigma level and tolerance. Thanks Kevin C Limburg for suggesting and contributing with the code. -
A bug on
ss.ccwhen passingclimitsargument has been fixed. Thanks Daniela Ramires for reporting.
November 2012
SixSigma
package has been updated to version 0.7-0.
A function to create control charts has been added. Check the
R Package section
in the sidebar menu to see examples. Moving range control charts are supported, after
qAnalyst package removal from CRAN (see below).
To create the Moving Range control chart described in Section 12.5 (pg, 226, fig. 12.6)
run the following code:
ss.cc("mr", ss.data.pb1, CTQ = "pb.humidity")
September 2012
Users of the SixSigma package must update their version of the
ggplot2 package to 0.9.2, in order to be able to use version 0.6.3 of
SixSigma. Both packages can be updated easily with the following code:
update.packages(oldPkgs = c("SixSigma", "ggplot2"))
Using the function without arguments, all the obsolete existing packages are updated upon confirmation.
Some of the examples that use ggplot2 package in the book may not
function appropriately. We will make available an updated version of the code which
run in the latest versions in section Chapters.
update.packages()
August 2012
The qAnalyst package has been removed from CRAN. It is used in
Chapter 12 for plotting moving-range control charts. The package can be
downladed yet from the CRAN archive. We plan to include a function for this task in
the SixSigma package soon.