Norm

ISO 7870-6:2016 en

Control charts - Part 6: EWMA control charts

98,05

Over deze norm

Status Definitief
Aantal pagina's 26
Commissie Toepassing van statistische methoden
Gepubliceerd op 15-02-2016
Taal Engels
ISO 7870-6 covers EWMA control charts as a statistical process control technique to detect small shifts in the process mean. It makes possible the faster detection of small to moderate shifts in the process average. In this chart, the process average is evaluated in terms of exponentially weighted moving average of all prior sample means. EWMA weights samples in geometrically decreasing order so that the most recent samples are weighted most highly while the most distant samples contribute very little depending upon the smoothing parameter (λ). The Shewhart control chart’s application is worthwhile in the rare situations when - production rate is slow, - sampling and inspection procedure is complex and time consuming, - testing is expensive, and - it involves safety risks.

Details

ICS-code 03.120.30
Nederlandse titel Control charts - Part 6: EWMA control charts
Engelse titel Control charts - Part 6: EWMA control charts
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