Gage Capability (Reproducibility and Repeatability)
William A. Levinson, P.E., CQE
Accepts data from the clipboard, e.g. data you copy from
a spreadsheet. The data columns must contain the Operator, Specimen, Replicate,
and Measurement. The first three (operator, specimen, and replicate) must
be integers. The measurement must be a real number. The sample data file
contains an example of the format, and you can use it to try the program.
(Do not copy the column labels, copy A2..D121 to reproduce the results
in SPC Essentials and Productivity Improvement, pp. 171-172)
Performs a gage capability study by means of:
Generates a range chart that shows sample ranges for each
operator and specimen.
the General Motors long form method (uses sample ranges and
control chart factors)
(other methods may be added later, e.g. Analysis of Variance/
For detection of outliers
The bitmap chart can be saved for copying into reports
ActiveX page with the program
for the program (gage_cap.hlp)
Help file contents
(gage_cap.cnt) Download the .hlp and .cnt files to have a Windows Help
file with a table of contents
in an Excel file (gage_cap.xls, version 5/95 for compatibility with older
The program has been marked as safe for initialization
and scripting. It writes a file called gage_cap.txt to your hard drive;
this is simply a copy of what you place on the clipboard. It does not write
anything else to your hard drive unless you tell it to, e.g. to save a
chart as a bitmap file.
Note: This program's output does not constitute
consulting engineering advice. Such advice can be provided only in person
by an engineer who is registered to practice in your state.
Levinson Productivity Systems, P.C.
William A. Levinson, P.E.,
American Society for Quality CQE, CRE, CQM, CQA,
Society of Manufacturing Engineers CMfgE, CEI
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