Quality Control Problem:

A B C D E F G I K M N P Q 1 2 3 4 5 6 7 8 9 In this problem, we assume that you are measuring the weight of an item that you are producing. You want to see if the process is in control or not. There are 19 samples and for each sample, there are 5 observation. By using sample mean and sample range control charts, determin if the process is in control? You need to obtain A2, D3, and D4 from a table. 10 20 11 12 13 14 USL 22 Process std 0.7 Cpk LSL 19 Observations (sample size) Samples Obs 1 Obs 2 Obs 3 Obs 4 Obs 5 1 21 21.5 20 20.8 20.5 2 20 20.8 22 20 19.85 3 21.8 20.45 19.99 20.5 21 4 20.8 21.1 20.9 20.86 21.5 5 19.5 21 20 20.8 6 20.9 22 20.45 19.99 18.99 7 18.8 20 20.8 19.99 20.5 8 20.45 19.99 19.2 20.5 20.45 9 18.8 20.45 19.99 20.9 20.86 10 20.9 20.86 20 20.8 21.4 11 20.86 21.5 20.3 20.86 21.8 12 20.9 20.86 20.45 19.99 19.5 13 19.8 20 20.8 20.9 20.86 14 18.5 20.45 19.99 20.86 21.5 15 20.8 22 20 20.7 20.55 16 20.9 20.86 20.45 19.99 20.5 17 20 20.66 20.45 19.99 20.14 18 20.85 20.45 19.99 20.9 20.86 19 20.8 22 20 20.8 19.8 Also, USL = 22 and LSL = 19. By using the USL and LSL, please determine the process capability index Cpk (1 points). 15 16 17 18 19 Correct values of D2, D3, ... Sample mean control chart Sample range control chart Is in control or not by using the two charts Cpk Is capable or not by using Cpk 20 21 22 23 24 25 D2 D3 26 27 D4 28 A2 29 30 31 32