The author believes that there are some aspects that should not be overlooked in the enthusiasm for advancing the statistical quality control technique. He shares some simple minded quality techniques that can prevent major pitfalls. These are the following not to overlook the obvious question the data not to disdain a simple minded approach, to adequately train operators, not to accept
... [Show full abstract] impossible requirements; sometimes drastic action is required; final test can be inadequate; Murphy's law applies.