Under what conditions would we be required to recalculate the parameters for an X-bar-R chart?
A)When the first sample mean crosses either the UCL or LCL.
B)When there is hugging observed in the data.
C)When we change the production process.
D)When dealing with a two-shift operation.

Question

Quizplus · Accepted Answer

We would be required to recalculate the parameters for an X-bar-R chart when we change the production process. This is because the new process may have different variability and mean than the previous one, which would affect the control limits of the chart. The other options, such as the first sample mean crossing the control limits or dealing with a two-shift operation, may require investigation and actions but would not necessarily require recalculation of the chart parameters. Hugging observed in the data may indicate a lack of variation but would not invalidate the current chart parameters.

Under What Conditions Would We Be Required to Recalculate the Parameters