When calculating control limits for X-Bar, MR Charts should the:
Average Moving Range,
Median Moving Range,
Square Root of MSSD,
be selected as the method of calculating the SD for the limits in minitab.
Note: k=54, n=4
The ISO 9001:2000 version section for internal audits (8.2.2) is nearly unchaged from ISO 9001:1994 clause 4.17....which means the requirements should be mostly unchanged. When I was at Newport Corporation, I was in the process of trying to get my auditors IRCA certifed. I was, and one other got certified, and had others in varying stages of progress. I recommend for internals that do not have potential for international exposure (in an audit role) either ASQ or RAB certification. For any that have the potential for international, then I recommend IRCA certification.
If you want a bit more info, chat with me directly.
© 2017 Quality Digest. Copyright on content held by Quality Digest or by individual authors. Contact Quality Digest for reprint information. “Quality Digest" is a trademark owned by Quality Circle Institute, Inc.