WHAT IS REPEATABILITY?
Repeatability refers to the closeness of agreement between repeated measurements obtained under the same conditions and serves as a foundational concept for assessing measurement reliability in scientific and technological disciplines. These conditions include the use of the same instrument, operator, method, and environment.
High repeatability means that variability between measurements is minimal. It reflects the short-term variation of a measurement system and is a key component of precision.
THE IMPORTANCE OF REPEATABILITY
Repeatability has a relevant role in metrology because it indicates the level of variation in a measurement system under identical conditions. Low variation means that the system produces consistent results over repeated measurements. In practical terms, repeatability is important because:
It helps identify the level of random error in a measurement process.
It ensures that measurement results are consistent and comparable over time.
It supports quality control by detecting instability in processes or instruments.
It is a key parameter in evaluating the performance of measurement systems.
It allows engineers to distinguish between true changes in a surface and measurement variability.
