Statistical process control (SPC) needs to start at the point where parts are created. The X-Bar&R chart, Histogram chart and capability indexes provide three vital steps in observing your manufacturing process, from start to finish, to ensure that the process remains in control throughout. But that is only part of the puzzle. In addition, these steps provide a visual representation of the process to show how it meets customer requirements, as well as ability of your process to create parts that fit those requirements.
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