IS 397 : Part 2 : 2003 Method for Statistical Quality Control During Production - Part 2 : Control Charts for Attributes

1 Scope

1.1 This standard (Part 2) outlines the method of control chartby attributes for controlling the quality during production. Theprocedure pertaining to control charts for fraction (or percent)non-conforming, number of non-conformities per item (or per 100items) are given in general terms.

1.2 The principle of control charts by attributes has also beenillustrated with a variety of examples. Certain broad guidelinesfor the interpretation of the data resulting from the controlcharts are also included.

2 References

IS 397 Methods for statistical quality control during production:

     Part 1 : 2003 Control charts for variables

     Part 4 : 2003 Special control chart by attributes

IS 7920 Statistical vocabulary and symbols:

     Part 1 : 1994 Probability and general statistical terms

     Part 2 : 1994 Statistical quality control

IS 9300 : Part 1 : 1979 Statistical models for industrialapplications: Part 1 Discrete models

IS 14977 : 2001 Control charts when inspection is by gauging