Question: row 11 A2 is .285 d2 is 3.173 D3 is .256 D4 is 1.744 Following is some SPC information about delivery times from a mail
row 11 A2 is .285 d2 is 3.173 D3 is .256 D4 is 1.744
Following is some SPC information about delivery times from a mail to order company. n=6 X-Bar Range UCL 5.05 6.74 CL 3.21 3.50 LCL 1.32 0.000 Range X-Bar We GRANO 2 5 10 Sampo A new survey showed that customers expected deliveries lasting between O and 7 days. a) What are the current process capability indexes of the process? b) Interpret the result obtained in a) Table D3 d2 1.128 1.693 : Sample Size = n 2 3 4 5 6 7 8 A2 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0.308 2.059 2.326 2.534 2.704 2.847 2.970 3.078 DA 3.267 2.574 2.282 2.114 2.004 1.924 1.864 1.816 1.777 0.076 0.136 0.184 0.223 9 10 11 0s 0 2 172 0756 1 244

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