Assuring the Quality of Test and Calibration Results - ISO IEC 17025 Clause 5.9

[aweinerth]

Thanks for the quick reply Suildur - I just basically wanted to get my hands on a procedure so I wouldn't have to write out all the instructions to comply with all the points mentioned in 5.9.1. I don't really have any questions or doubts as to what the standard is requesting. We're on a fast track, and as such we're trying to get the basic skeleton if it's available out there. If you have the ability to get your hands on an English version, then please forward it; if not, don't worry.

 

[plusunim]

I asked, if I must apply any statistical method to check whether the distribution of the sample space (calibration step results) is meaningful or not, each time I calibrate something. I got an answer from another lab, that there is no need to apply those statistical methods for the calibration.

Does this mean that ILCs are enough? Can you please elaborate on the reply given? i too am in the process of accrediting a calibration lab.

 

[Hershal]

Suildur, Clause 5.9.1 regards YOUR results. TYPICALLY, this means an independent sample, such as a pin gage or a DMM provided by a PT provider. Should you monitor and even statistically evaluate results provided to customers? A good thing to do, but not required under this Clause.

 

[Hershal]

Oh, and you are correct, Z scores do not apply for calibration, we use En scores. An En score greater than 1 is considered an outlier and requires corrective action.