Not all calculation methods are equal. Use this guide to help pick the right method for your job.

Gage Repeatability and Reproducibility (GR&R) studies provide information on measurement system performance by analyzing measurement error from various sources. Typically the sources of variation are divided into three categories: part-to-part, operator or appraiser, and gage or equipment. In some instances another category, interaction between parts and operators, can provide additional information about the gaging process. Not all calculation methods provide the same information or the same result, so it is important to pick an appropriate calculation method.