A control chart is used to:

monitor a process over time using samples

In quality control, why are samples taken rather than testing every item?

Testing everything is slow and costly

out of control and must be stopped

both correctly centred and consistent

a sign the process is drifting and should be checked

beyond the action limit, so out of control

using sampling and statistics to keep output within acceptable limits

12questions. Pick an answer and you'll see why right away.

A control chart is used to:
In quality control, why are samples taken rather than testing every item?
A control chart for the sample mean monitors whether the process is:
A control chart for the range monitors the process:
A point inside the warning limits indicates the process is:
A point between a warning limit and an action limit means you should:
A point beyond an action limit means the process is:
Warning limits are usually set so that about what percentage of samples fall inside when in control?
Using both a mean chart and a range chart together checks that the process is:
A run of points drifting steadily towards a limit, though still inside, is:
A mean chart has a target of 250 g and action limits at 240 g and 260 g. A sample mean of 262 g is:
Quality assurance is best described as: