IS 397 Pt.1-1972

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标准号:IS 397 Pt.1-1972
发布日期:1973/6/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard ( Part I ) outlines the method of control chart by variables for controlling the quality during production. The principles of procedure pertaining to control charts for individual observations, averages, medians, mid-ranges, ranges and standard deviations are given in general terms.1.2 The standard also lays down the procedures for the construction of modified control charts which can be usefully adopted when the manu-facture is undertaken to predetermined specifications.1.3 The principles of control charts have been illustrated with a variety of examples. Certain broad guidelines as to the interpretation of the data resulting from control charts are also included.

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