Hello everyone,
We are ISO 17025 accredited testing laboratory. We create control charts and monitor them regularly. I have just realized that the size of the points are very variable in different test methods (some labs calculating 60 points, other 25 points etc). Are there an optimum number of points in creating control charts that will give a correct statistical analysis?
Thank you very much, any thoughts are very much appreciated,
Emine
We are ISO 17025 accredited testing laboratory. We create control charts and monitor them regularly. I have just realized that the size of the points are very variable in different test methods (some labs calculating 60 points, other 25 points etc). Are there an optimum number of points in creating control charts that will give a correct statistical analysis?
Thank you very much, any thoughts are very much appreciated,
Emine