Author Question: Statistical process control charts (Read 31 times)

karateprodigy · **on:** Dec 3, 2019

Question 1

An x-bar control chart was examined and no data points fell outside of the limits. Can this process be considered in control?
◦ No, the number of samples must be known.
◦ Yes.
◦ Yes, there is not enough data to determine otherwise.
◦ No, there could be a pattern to the points, the R-chart must be checked.
◦ Yes, it is unlikely that there is a pattern in these points.

Question 2

Statistical process control charts
◦ display the measurements on every item being produced.
◦ display upper and lower limits for process variables or attributes, and signal when a process is no longer in control.
◦ indicate to the process operator the average outgoing quality of each lot.
◦ display the measurements on every item being purchased.
◦ indicate to the operator the true quality of material leaving the process.

juliaf · **Reply #1 on:** Dec 3, 2019

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