Purpose:
The purpose of the gage R&R analysis is to quantify the magnitude of variation of a measurement system. To ensure the benefit derived from using measurement data is of value and cost effective, attention must be focused on the quality of the measurement data. One of the most common reasons for low-quality data is too much variation in the measurement data. For example, a measurement system with a large amount of variation may not be appropriate for use in analyzing an injection molding process because the measurement system’s variation may mask the variation in the injection molding process.