At the Bright Idea Lighting Company ten flashlights are sampled each hour to determine whether the manufacturing process is in control. The UCL is
Create a process control chart for the following hours.
Place the 'hours' on the x-axis and the 'proportion defective' on the
-axis. Scale the -axis from to .
As a quality control engineer for Bright Idea, what do you report about the process control?
Draw a centerline at
on your graph.
Comment on how close/far the points are relative to the centerline.
What about several points in a row staying above/below the centerline?