Question: In quality control, statistical process control (SPC ) is often employed to analyze the process capability in manufacturing or service operations. Explain the following with

In quality control, statistical process control (SPC ) is often employed to analyze the process capability in manufacturing or service operations. Explain the following with an example each :

What is a p chart ?
What is a c chart ?

There are 3 machines in your factory which can produce a ruler. The rulers as produced has a spread in length between 12.5 thru 12.4 inch.

The standard deviation of the 3 machines are

* 0.15

* 0.09

* 0.13

Please calculate the respective process capabilities

Given the standard deviation of the 3 machines are as follows, calculate the process capability of each machine. Which of the 3 machines has the best process capability index ?

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