TRUE OR FALSE

7 The following are processing times for an assembly operation. Requirements are 8 and 22. Annual volume is 40,000. Use the table below to comment on the process. If the process is in control the proportion non-conforming is closest to 1 Sample Date 1 2 3 4 5 6 Sum Average Range 12-Sep| 10| 14 13 11 13 11 72 12.00 4 13-Sep 17 12 16 14 11 16 86 14.33 6 14-Sep 16 14 12 11 10 15 78 13.00 6 15-Sep 13 13 10 12 16 12 76 12.67 6 16-Sep 15 13 13 14 13 12 13.33 3 17-Sep 15 14 10 10 12 12 73 12.17 5 18-Sep 11 12 12 17 15 16 13.83 6 19-Sep 14| 11 17 11 17 17 87 14.50 6 20-Sep 15 12 10 14 15 14 80 13.33 5 21-Sep 16 14 14 16 13 15 88 14.67 3 22-Sep 14 10 16 11 101 17 78 13.00 7 23-Sep 13 16 101 121 121 15 78 13.00 6 24-Sep 14 13 13 12 15 15 82 13.67 3 25-Sep 17 13 11 10 17 17 85 14.17 7 26-Sep 17 16 14| 12 13 15 87 14.50 5 27-Sep 16 10 12 12 13 10 73 12.17 6 28-Sep 12 11 16 11 14 13 77 12.83 5 29- 12 10 17 13 15 10 77 12.83 7 30-Sep 10 14 16 17 10 13 80 13.33 7 1-Oct 12 16 17 15 101 13 83 13.83 7 Avg 13.36 5.50 TT O 8% 9% 7% O The process is not in control 4 Evaluate the following using the table below. USL = 52, LSL = 29 The pattern of variation for the ranges is random. 1 2 Date Average Range 04-Oct 31 40 39 37 39 37 44 38.1 13 05-Oct|38|43|40|36|43|42| 40 40.3 7 06-Oct| 38 37 31 41 39 39 350 37.1 10 07-Oct|38|43 38 41 39 39 40 39.7 5 08-Oct| 3938|41| 4031|35| 38 37.4 10 09-Oct|38|37 38 38|45|41 42 39.9 8 10-Oct|40|37|46374844| 41 41.9 11 11-Oct|38|35|40| 41| 40| 42| 401 39.4 7 12-Oct|40|42|39| 41|40|35421 39.9 7 13-Oct|37|36|43394235| 38 38.6 8 14-Oct|38|41| 40 39 39 38 41 39.4 15-Oct|41|443936364645 41.0 10 16-Oct|45|4240 38 39 41 43 41.1 7 17-Oct| 33/38 38 39|34|38| 36| 36.6 6 18-Oct|43|37| 40 39 38 32 46| 39.3 14 19-Oct|39|41 341 341 40 42 44 39.1 10 20-Oct| 36 39 38 42144141 361 39.4 8 21-Oct|39|44| 37 37 38 36 44 39.3 8 22-Oct|37|39|43| 39|41|43| 41 40.4 6 23-Oct 43 42 42 44 40 40 41 41.7 4 Avg 39.49 8.10 [3] False True