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Determine the objectives of the nonconforming charts? Dotermine trial control limits and revised limits for each subgroup. Assume that any out-of- control points have assignable causes. Control limits arc to bc cstablished based on the average number inspected from the information. What are thesc control limits and the central line?

Determine the objectives of the nonconforming charts? Dotermine trial control limits and revised limits for each subgroup. Assume that any out-of- control points have assignable causes. Control limits arc to bc cstablished based on the average number inspected from the information. What are thesc control limits and the central line?

Solid Waste Engineering
Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter3: Collection
Section: Chapter Questions
Problem 3.9P
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Qn.1 Daily inspection results for the model 305 electric range assembly line are given in the following table and answer the following questions. Take assumptions where applicable, a) Determine the objcctives of the nonconforming charts? b) Dotermine trial control limits and revised limits for each subgroup. Assume that any out-of- control points have assignable causes. c) Control limits arc to be cstablished based on the average number inspected from the information. What are thesc control limits and the central line? d) Detcrminc if the process is stable? c) Find the process capability of the charts? Date and Shift Number Number Date and Number Number Inspected Nonconforming Shift Inspected Nonconforming Nov. 8 I 171 31 Nov. 17 I 165 16 II 167 II 170 35 170 8 181 175 12 II 135 13 II 167 101 137 26 191 141 50 26 30 3 170 II 159 45 221 181 16 II 155 11 II 195 38 12I 195 30 23I 165 33 21 II 241 II 180 36 140 151 181 38 162 18 33 II 191 22 115 139 16 251 II 161 165 26 181 27 II 189 15
Transcribed Image Text:Qn.1 Daily inspection results for the model 305 electric range assembly line are given in the following table and answer the following questions. Take assumptions where applicable, a) Determine the objcctives of the nonconforming charts? b) Dotermine trial control limits and revised limits for each subgroup. Assume that any out-of- control points have assignable causes. c) Control limits arc to be cstablished based on the average number inspected from the information. What are thesc control limits and the central line? d) Detcrminc if the process is stable? c) Find the process capability of the charts? Date and Shift Number Number Date and Number Number Inspected Nonconforming Shift Inspected Nonconforming Nov. 8 I 171 31 Nov. 17 I 165 16 II 167 II 170 35 170 8 181 175 12 II 135 13 II 167 101 137 26 191 141 50 26 30 3 170 II 159 45 221 181 16 II 155 11 II 195 38 12I 195 30 23I 165 33 21 II 241 II 180 36 140 151 181 38 162 18 33 II 191 22 115 139 16 251 II 161 165 26 181 27 II 189 15
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