This section describes the test methods that, for the identification of the most important abnormal patterns of one kind. This test method can determine whether there is a variety of factors constantly changing. In making this test, to take only half of FIG controls to make discussion described, i.e., between the center line and any control limit, then this half control diagrams divided into three areas, each area designated as FIG. Fig. Since the control limits used by the control chart, as three standard deviations ([sigma]) the control limits, so that the width of each area, the difference is just a standard. So this points system I can be called "a standard deviation area" "two standard deviations region" and "three standard deviations region" and so on. <br>The method of the assay is hereby listed below, each of the methods, the drawings and description. Compliance with any of the following of a person, that is not the normal type.
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