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BS ISO 7870-1:2019 pdf free

BS ISO 7870-1:2019 pdf free.Control charts – Part 1: General guidelines.
For the purposes of this document, the terms and definitions given in ISO 3534-1, ISO 3534-2 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 control chart
chart with control limits (3.2) on which some statistical measure of a series of samples is plotted in a particular order to steer the process with respect to that measure
Note ito entry: The particular order is usually based on time or sample number order.
Note 2 to entry: The control chart operates most effectively when the measure is a process variable which is correlated with an ultimate product or service characteristic.
[SOURCE: ISO 3534-2:2006, 2.3.1, modified — added Nwith control limits” after “chart” in definition, deleted “and to control and reduce variation” after ‘to that measure”.]
3.2 control limit
statistical value defining an intended level of stability for a produced characteristic
Note I to entry: One or two control limits are represented on the control chart.
Note 2 to entry: The term stability is not meant only for a process in control but it can also be stability against a target value.
3.3 Shewhart control chart
control chart (ii) with Shewhart control limits (i4) intended primarily to distinguish between the variation in the plotted measure due to random causes and that due to special causes
[SOURCE: ISO 3534-2:2006, 2.3.21
3.4 Shewhart control limit
control limit (12) determined statistically from the variation of the process due to the random causes alone
3.5 acceptance control chart
control chart (311) intended primarily to evaluate whether or not the plotted measure can be expected to satisfy specified tolerances
[SOURCE: ISO 3534-2:2006, 2.3.3j
3.6 process adjustment control chart
controlchart (11) which uses a prediction model of the process to estimate and plot the future course of the process if no change is made, and to quantify the change to be made to keep the process deviations within acceptable limits
[SOURCE: ISO 3534-2:2006, 2.3.41
3.7 variables control chart
control chart (311) in which the measure plotted represents data on a continuous scale
[SOURCE: ISO 3534-2:2006, 2.3.6, modified — deleted “Shewhart before control chart.]BS ISO 7870-1 pdf free download.

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