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Quality Control: S Chart
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1. Chart description: standard deviations of a continuous variable.


2. Click Quality Control | S...

Variables  observations for a subgroup are in one row of columns.

Estimate (UWAVE-SD / MVLUE-SD / RMSDF)

UWAVE-SD  UnWeighted AVErage of subgroup estimates based on subgroup Standard Deviations.

MVLUE-SD  Minimum Variance Linear Unbiased Estimator computed as a weighted average of subgroup estimates based on subgroup Standard Deviations.

RMSDF  Root-Mean-Square estimator computed as a weighted average of subgroup estimates based on subgroup Standard Deviations.



3. After the chart is generated, click Commend (refer to GUI) to view the chart.