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ISO DIS 7870-8 2015 Edition, December 15, 2015 CONTROL CHARTS - PART 8: CHARTING TECHNIQUES FOR SHORT RUNS AND SMALL MIXED BATCHES
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Availability date: 07/14/2021
Description / Abstract:
This part of ISO 7870 describes ways of applying regular
variables control charts to short runs and small mixed batches
where the sample size for monitoring is restricted to one. It
provides a set of tools to facilitate the understanding of sources
of variation in such processes so that the processes can be better
managed.
The charts described are process focussed rather than product
focused. The user can plot, monitor and control similar
characteristics on different items, or different characteristics on
an item, on a single control chart.
NOTE 1 The terms short run and small batch size are not well
defined. Here short run and small batch size are taken to mean only
a few items are manufactured before a different item is then
produced.
NOTE 2 For situations where the subgroup size is larger than one
other standards apply.