ISO (International Organization for Standardization) 17025 is the international standard for testing and calibration laboratories. The decision rules are a critical part of this standard, helping industrial organizations determine whether a measurement result is valid. Measuring instruments and sensors can lead to inaccurate results if they are utilized for a long time before reaching calibration. These decision rules are essential for ensuring accurate and reliable outcomes. Thus, the organization must reach out to an ISO-certified calibration and testing service in Singapore for a more accurate calibration result.
In this article, we’ll discuss the five steps to implement ISO 17025 decision rules in your laboratory and how to incorporate them into calibration results.
Step 1: Determine the Decision Rule
The first step you need to consider in choosing the right decision rule. Decision rules can be statistical, regulatory, or meteorological. The choice depends on the nature of the measurement and the laboratory’s requirements.Step 2: Define the Acceptance Criteria
Next, define the acceptance criteria. These criteria are the limits within which a measurement result is considered valid. The major reason for companies in Singapore to perform calibration is accuracy. Therefore, the criteria should be based on the laboratory’s measurement uncertainty and ensure the accuracy and reliability of the results.Step 3: Verify the Decision Rule
Before implementation, verify that the decision rule is suitable for the laboratory. Conduct a validation study by applying the decision rule to a set of calibration results and comparing them to a reference value.Step 4: Implement the Decision Rule
After verification, integrate the decision rule into the laboratory’s quality management system. Train staff on how to apply the rule and ensure consistent application across all measurements.Step 5: Monitor and Review
Various industries in Singapore apply decision rules for calibration. They regularly monitor and review the rule application to maintain accurate and reliable results every time. Adjust the decision rule or acceptance criteria as necessary based on the review.Applying the Decision Rule to Calibration Results
Following are a few steps to apply the decision rule to calibration results:- Check Acceptance Criteria: Determine if the measurement result meets the acceptance criteria. If it does, there is no need to take further action.
- Decision Limit Comparison: If the result does not meet the acceptance criteria, compare it to the decision limit—the maximum acceptable deviation from the reference value.
- Action Based on Comparison: If the result is within the decision limit, it is acceptable, and no further action is required. But if it exceeds the decision limit, take appropriate action. You can repeat the measurement, investigate the deviation, or adjust the measurement method.
- 4. Regular Review: Regularly review the decision rule and acceptance criteria to ensure they remain effective. Modify them based on the laboratory’s experience and stakeholder feedback.
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