- regelkaart
- control chart
- carte de contrôle
- Qualitätsregelkarte
Een kaart met bovenste en onderste regelgrenzen waarop waarden van metingen
van steekproeven of subgroepen worden gezet.
Op de kaart is meestal een centrale lijn waarneembaar waardoor een trend in
de richting van een van beide regelgrenzen kan worden
onderkend.
Bron: http://www.leanmanagement.nl/
Statistical charts used in process measurement. Used to differentiate process variation caused by common cause versus special cause or assignable cause.
A chart that indicates upper and lower statistical control limits, and an average line, for samples or subgroups of a given process.
If all points on the control chart are within the limits, variation may be ascribed to common causes and the process is deemed to be "in control."
If points fall outside the limits, it is an indication that special causes of variation are occurring, and the process is said to be "out of control."
a line chart with control limits. It is based on the work of Shewhart and Deming. By mathematically constructing control limits at 3 standard deviations
above and below the average, one can determine what variation is due to normal ongoing causes (common causes) and what variation is produced by unique
events (special causes). By eliminating the special causes first and then reducing common causes, quality can be improved
source: www.adamssixsigma.com
The two main uses for these charts are to monitor whether the system is stable and under
control (to warn of changes), and to substantiate results from changes introduced into the
system (to confirm positive results).
source: How to measure performance, A handbook of techniques and tools, Oak Ridge Associated Universities
Control charts are a graphical display of the results, over time, of a process.
They are used to determine if the process is "in control" or in need of
adjustment.
Source: Max Wideman.com
Copyright: Wideman Comparative Glossary
of Common Project Management Terms v3.1 is copyright by R. Max Wideman, March
2002.
See also:
www.sigmapedia.com
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