Включить меню
RU

Страна

RU

Выберите регион:

Загрузить
Загрузить

Загрузить руководства, технические описания, программное обеспечение и т. д.:

ТИП ЗАГРУЗКИ
МОДЕЛЬ ИЛИ КЛЮЧЕВОЕ СЛОВО

Tektronix Decision Rule Guide

A key change in the new ISO/IEC 17025:2017 standard is that customers confirm their understanding of the decision rule we use to determine an "in-tolerance" or "out-of-tolerance" condition when completing ISO/IEC 17025 accredited calibration. This guide is provided to support your understanding of the three decision rules that may be used. 

We understand that a decision to change to a different decision rule may involve multiple stakeholders within your organization and could take some time. We are ready, willing and able to engage with you in this process. Acceptance of the current decision rule today does not preclude you from changing to a different decision rule later – for individual instruments, or for all of your instruments.

Decision Rule 1:

For ISO/IEC 17025 calibrations, when determining an “in-tolerance” or “out-of-tolerance” condition, the measurement uncertainty will not be taken into account when an “in-tolerance” or “out-of-tolerance” determination is made. When a measurement result for the device under test (DUT) is declared “in-tolerance”, the measured value(s) shall fall within the appropriate specification limit and the uncertainty of the measured value shall be stated and provided for customer evaluation.

 

tektronix_-_decision_rule_guide

 

 

 

 

 

Decision Rule 2:

For ISO/IEC 17025 calibrations, when determining an “in-tolerance” or “out-of-tolerance” condition on calibrations, the measurement uncertainty shall be a consideration in that decision.  

  1. If the measurement result and the associated uncertainty range are within the appropriate specification limit, the measured value will be declared “in-tolerance”.
  2. Conversely, if the measurement result and the associated uncertainty range falls outside the specification limit, the measured value will be declared “out-of-tolerance”.
  3. For a measurement result where any portion of the uncertainty range lies outside the specification limit, no “in-tolerance” or “out-of-tolerance” determination will be made. When no conformance determination is made, the measured value will be reported “as read / indeterminate” with associated measurement uncertainty provided for customer evaluation.
  4. The device-under-test overall “as-found” and “as-left” condition will be determined on “in-tolerance” or “out-of-tolerance” determinations only.

Noted exception:  Keithley OEM Default Decision Rule 2 applies for the 4200A-SCS SMU, CVU, and PGU in Clarius+ V1.8.1HF2, Clarius+ V1.9, and later.  All other system software versions are Decision Rule 1.

Tektronix2020Decision20Rule20Guide2

 

 

 

 

 

 

Decision Rule 3:

The following decision rule is used for commercial multi-brand Z540.3 (PFA=2%) calibrations and may be specified for commercial multi-brand ISO/IEC 17025 calibrations with respect to “in-tolerance” or “out-of-tolerance” determination after guard banding criteria is applied:

  1. If the measurement result and the associated uncertainty range are within the appropriate specification and guard band limits, the measured value will be declared “in-tolerance”.
  2. If the measurement result and associated uncertainty range intersects or exceeds an acceptance or guard band tolerance limit, the measured value will be declared “out-of-tolerance”.

 

Tektronix2020Decision20Rule20Guide3

 

 

 

 

 

Please download the Customer Decision Rule Agreement Form here. Download the full Decision Rule Guide using the Download File button below