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Which of these charts can be used instead of Shewhart control charts, in the case of small number of subgroups used to construct the charts, which were recommended by Quesenberry?

Which of these charts can be used instead of Shewhart control charts, in the case of small number of subgroups used to construct the charts, which were recommended by Quesenberry? Correct Answer Q-charts

Quesenberry recommended the Q charts to be used in the place of the Shewhart control charts, in the case of small subgroup number used to calculate the control limits. This was because small number of subgroups used with Shewhart control charts, increased their FAR.

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