What is Repeatability and Reproduceability
Repeatability and reproducibility testers stated that repeatability is the measurement variation obtained by making multiple measurements of the same feature on the same part by an appraiser using the same measuring instrument; it is the inherent variation or capability of the equipment itself .
Repeatability and reproducibility testers said that reproducibility is usually defined as the variation in the average value of the same characteristic measured on the same product by different appraisers using the same measuring instrument.
Guidelines for Determining Repeatability and Reproducibility - Range Method
Repeatability and reproducibility testers said that the range method is a modified metrology-based gage study that provides a quick approximation of measurement variation. This method can only provide an overall picture of the variation of the measurement system, and cannot decompose the variation into repeatability and reproducibility. It is usually used as a quick check to verify if there is a change in GRR.
Repeatability and reproducibility testers stated that the probability of potentially detecting an unacceptable measurement system using this method is: for a sample size of 5, the probability is 80%; for a sample size of 10, the probability is is 90%.