Question: The upper and lower specification limits for a service are 6.0 minutes and 4.0 minutes respectively. The process standard deviation is 0.24 minutes and the

  1. The upper and lower specification limits for a service are 6.0 minutes and 4.0 minutes respectively. The process standard deviation is 0.24 minutes and the process average is

5.0 minutes. If four-sigma capability is the goal, what conclusion can be drawn?

  1. the process is not capable
  2. the process is semi-capable
  3. the process is capable
  4. the specifications should be changed to 5.24 and 4.76 minutes respectively.

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