Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard (Part 3) (Second Revision) which is identical with ISO 7870-5 : 2014 ‘Control charts — Part 5: Specialized control charts’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Statistical Methods for Quality and Reliability Sectional Committee and approval of the Management and Systems Division Council.

This Indian Standard is published in several parts. The other parts in this series are:

Part 0 Guidelines for selection of control charts

Part 1 Control charts for variables

Part 2Control charts for attributes

Part 4 Cumulative sum chart

Part 5 Acceptance control charts

Part 6 EWMA control charts

Part 8 Charting techniques for short runs and small mixed batches

This standard was originally published in 1980 and subsequently revised in 2003 to describe special control charts for variables. Special control charts for attributes were covered in erstwhile IS 397 (Part 4) : 2003. The second revision of this standards has been undertaken:

a) To include various types of specialized control charts for variables, as well as, attributes in the same standard to provide guidance on the use of specialized control charts; and

b) To harmonize this standard with the corresponding International Standard, ISO 7870-5. The major changes in this revision are as follows:

a) ‘z-charts’ and ‘control charts for non-normal data’ for variable data have been included;

b) control charts for inspection by gauging, earlier published as IS 14977 : 2001, have been included;

c) Master control systems charts for attributes data, earlier included in erstwhile IS 397 (Part 4) : 2003 have been included as National Annex A; and

d) A note has been added in the adopted version in Clause 15.9.1 Comparison with (X¯, R Chart).

The philosophy of the control chart approach and the basic principles and concepts underlying control charts have been covered in IS 397 (Part 1), which is a necessary adjunct to this standard.

The text of ISO Standard has been approved as suitable for publication as Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.