Method, apparatus and product for analyzing a quality control regimen
comprising one or more quality control tests, to determine if the tests
are in statistical control, and therefore could be removed from the
regimen or sampled at a different rate. On sample data relating to each of
the tests, there is determined C.sub.pi, a measure of the spread of the
data, which is simply the ratio of the magnitude of the actual range of
the data, to the magnitude of calculated statistical range of the data.
There is also determined C.sub.PKi, which is a measure of how close the
spread of the data is to the upper or lower limit of the data. For
convenience, the magnitude of C.sub.pi is represented as a vertical bar
graph, with the value of C.sub.PKi shown as a position of the bar graph
within normalized limits. Using .sub.Cpi and C.sub.PKi decisions regarding
removal of each the test can be made. One or more tests are then selected
for removal or to have a different sampling rate, and "What If" scenarios
then performed to see how the testing regimen would have performed without
the test(s) or at the different sampling rate.
