ISO/IEC 17025:2017 Webinar Questions & Answers
We recently had a webinar on the 2017 revision to ISO/IEC 17025. You can watch the webinar recording and get the presentation PDF now.
During and after the webinar, we received questions from participants; many questions were about TUR - Test Uncertainty Ratio. We have a separate blog related to this topic, and the answers to the other questions that came from the webinar below.
A Question on Test Uncertainty Ratio:
It is understood that in %RH and dew point calibration, the rule of 4:1 test uncertainty ratio (TUR) is rarely achieved. This is true even at the level of NIST/PTB/NPL when transferring their uncertainty to our chilled mirror. How do you incorporate this in your calibration process?
Our Calibration Experts Answer:
Another Question:
Due to limited TUR ratio (between the lab declared CMC and the unit under calibration), what will be the risk assessment and how to approach to mitigate this situation?
Our Calibration Experts Answer:
We look at what the severity of a failure would be, and/or what that instrument is used for. Things like how often it is calibrated or what is the history of the instrument in terms of its previous calibrations, its stability and drift over time to get an idea of its probability of failure. If you have something that drifts and doesn't get checked often and is part of a critical process then that would be classified as a high risk instrument that you would want to take action on. Maybe your best course of action is to decrease the calibration interval, or get an accredited calibration, or use a tighter conformance decision.
More Q&A on ISO/IEC 17025:2017 Below...
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Q 1. What is range of laboratory activities?
Q 2. How the competency of lab staff is assured?
Q 3. What is difference between the supervision and monitoring?
Please find the scope of accreditation document for our Boston calibration laboratory (link below), which provides accredited calibrations in the parameters of relative humidity, temperature, dew point and pressure.
https://www.vaisala.com/sites/default/files/documents/A2LA_1.pdf
2. The competency of the staff is tracked by the Laboratory Manager through competency matrix. It is maintained by quarterly rotations of staff through job responsibilities and calibration parameters.
3. Generally speaking from a calibration lab manager's perspective, supervising involves a more “hands-on” approach, whereas monitoring implies more just observation without interacting.
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