An x-bar and R chart is used to monitor a process.

Vendor: GAQM
Product: CLSSBB
Update on: Jul 25, 2025
Questions: 357

GAQM CLSSBB Question Answer

An x-bar and R chart is used to monitor a process. One week ago a new type of raw material was introduced and since that time 60 points have been plotted on the xbar chart and all are in the middle third of the chart. The corresponding 60 points on the R chart are all below the average range. This indicates that:

the operator has been plotting the points incorrectly

it is time to recalibrate the gage used

it is time to recalculate the control limits

the material manager should be asked to go back to the previous raw material so the charts will more accurately reflect the process