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Es geht um Ursachen für Prozessvarianz. Leider wird das an einem recht speziellen Beispiel erklärt. Wer kann mir mit den Fachbegriffen helfen?

The following example investigates potential sources of variation in breaking strength in a spin draw process.
Output: Breaking Strength
Inputs Tracked: Day, Doff, Spinneret and Draw ratio.

An anderer Stelle heißt es:
These results show that, as Draw Ratio varies from 1% to 10%, the average Breaking Strength varies from 18.8 to 24.5. If we could center Draw Ratio on 5%, the sigma for Breaking Strength would be reduced from 3.4 (Total Variation) to about 1.8.

und dann noch:
Exercise: Investigate Day, Doff and Spinneret in the same way and be ready to report conclusions. Which is the strongest input in explaining variation in Breaking Strength.