A glass factory makes a continuous ribbon of glass by pouring a continuous stream of hot, liquid silicon on a lake of molten tin. The liquid silicon spreads out evenly on the tin and then cools into glass. It is a process that must continue uninterrupted
‑bar process control chart with a UCL of and an LCL of .
Make a graph where the
-axis is Hours, the -axis is Defects.
-axis should range from to .
What do you notice about the process control chart that might concern you as a quality control engineer?
Answers will vary, but notice that there appears to be a cycle every