Test results: 4 cases do not need to report uncertainty, 3 cases must report uncertainty.

1) In some cases, the recognized detection method sets limits on the main source of measurement uncertainty and specifies the representation of the calculation results, and the laboratory meets the requirements of the ISO17025 as long as it complies with the detection method and reporting requirements.

Note that the laboratory should pay attention to operating in accordance with standard operating procedures.

a) The test results are not expressed by numerical values.

B) Test results are not based on numerical values

For example, the results are expressed as pass/fail, negative/positive.

The following situations require the uncertainty of the measurement results to be reported in the test report:

For example, if the laboratory makes a comparison, the En value needs to be used to evaluate the results.

2) Customer requirements report uncertainty or legal and regulatory standards are required:

For example, the customer specifies the need for uncertainty data in the contract.

3) When measuring uncertainty affects compliance with the specification limit.

Calibration results need to be taken with uncertainty, there is no discussion.