Precision and Accuracy in Laboratory Quality Control

Definitions of precision and accuracy in clinical diagnostic laboratories according to GOST R 53133.2-2008: impact of random errors and deviation assessment.

Editorial team 1 min April 28, 2024

Diagram showing the relationship between precision and accuracy of measurements on targets

✅What are precision and accuracy in quality control?

Precision: The degree of closeness to each other of independent measurement results obtained under specific defined conditions.
Precision depends only on random errors and is not related to the true or established value of the measured quantity.
The measure of precision is calculated as the standard deviation of the measurement results.
Lower precision corresponds to a larger standard deviation.
Accuracy: The degree of closeness of a measurement result to an accepted reference value. 👉Source: 1. GOST R 53133.2-2008 Clinical Laboratory Technologies. Quality Control. ⚠You can download regulatory documents on quality control in our library 🧪LAB-TESTS.