11 The Cpk should be used when the process Is not centered between the specifications Is centered between the control limits Should never be used Has a two sided specification limit 9 The following are response times for customer service. Requirements are 10.00 to 15.00. Annual volume is 600,000. Each "bad" one cost $12. Use the table below to comment on the process. If the process is in control the sigma level is 1 Observation 1 2 3 4 Sample 2 14 13 13 4 11 14 Range 4 4 13 3 3 2 5 4 6 7 8 9 10 10 10 12 10 13 15 11 11 13 12 14 11 12 12 14 13 14 13 13 3 2 4 1 11 12 13 14 3 13 12 10 13 11 11 12 13 12 13 12 12 12 14 13 13 14 12 12 13 11 15 14 14 11 13 11 13 15 Sum Average 48 12.00 49 12.25 46 11.50 49 12.25 49 12.25 51 12.75 49 12.25 50 12.50 49 12.25 50 12.50 50 12.50 52 13.00 49 12.25 55 13.75 48 12.00 49 12.25 53 13.25 50 12.50 47 11.75 50 12.50 45 11.25 50 12.50 53 13.25 Aerage: 12.40 11 13 13 13 12 13 10 12 11 15 13 13 10 12 13 12 14 12 12 10 12 3 4 2 2 4 14 15 16 17 18 19 20 21 22 23 11 13 14 10 12 10 13 13 13 13 12 11 13 12 12 14 2 1 2 4 1 2 5 2 2.78 O 1.56 1.86 Not in control .86