WHAT IS PRECISION?
Precision is a measure of how repeatable a measurement is under the same conditions. It describes how close repeated measurements are to each other, regardless of whether they are close to a reference value.
A measurement is considered precise when repeated results show low variability. Precision can be evaluated under repeatability conditions (same conditions) or reproducibility conditions (different operators, instruments, or environments).
This concept differs from accuracy, which refers to how closely a measurement aligns with the true or accepted value.
Precision is fundamental in metrology because it characterizes the variability of a measurement system and helps assess the quality of measurement processes.
WHY IS IT IMPORTANT?
In practical terms, the importance of precision can be summarized in several key aspects:
High precision indicates low variability in repeated measurements, even if systematic errors are present.
Precision is usually measured using statistics, such as standard deviation.
Precision supports quality control, process stability, and reproducibility in scientific and industrial applications.
