What You Need to Know About Measurement System Analysis
Not every organization is aware of the importance of
understanding and quantifying the variation in measurement systems.
Without a good measurement system, there is no way of knowing what
the true output of a process really is! Based on measurements that
are taken during manufacturing, an organization may think that it is
producing good parts only to find out that the parts are seriously
defective or out-of-tolerance because the measuring device used is
inaccurate, out-of-calibration, or not stable. When that happens,
you might as well be using a rubber ruler for measuring!
R&R Studies are the most widely used techniques for evaluating
the variation in a measurement system and determining if the
measurement system is acceptable for use. Once a measurement system
is found acceptable, it is equally important to institute a formal
system to manage the measurement system to ensure that it continues
to be reliable and dependable. Use of structured GR&R techniques
with a comprehensive calibration system for measurement devices is
the only way to avoid the rubber ruler syndrome.