Quality professionals know that measuring manufactured products is critical to maintaining the customer specification. They also know that measuring products is necessary for statistical process control systems designed to improve the manufacturing process itself. What is sometimes forgotten is that the data is only worthwhile if the measurement system itself is adequate.
A Gage R&R study will tell operators if the measurement system is acceptable for its intended use. The Gage study also shows which part of the measurement system is contributing the most to the variation of the measurements and helps operators plan improvements to the system.