A PICTURE IS WORTH A THOUSAND WORDS

摘要

One of the most powerful tools in an investigator's toolbox is graphical analysis. The idiom "a picture is worth a thousand words" aptly describes the power of a graph to communicate a nonconformance and the potential root cause at a glance.Histogram distribution patternsOver time, a calibrated instrument that is used to monitor a process may drift out of tolerance (OOT), which is why it's important to maintain a calibration maintenance schedule to verify and adjust measuring equipment before the accuracy of the equipment drifts OOT.