At Quick Car Wash, the wash process is advertised to take less than 8 minutes. Consequently, management has set a target average of 440 seconds for the wash process. Suppose the average range for a sample of 9 cars is 10 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process. Factors for calculating three-sigma limits for the x-chart and R-chart Size of Sample (n) Factor for UCL and LCL for x-chart (A2) Factor for LCL for R-Chart (D3) Factor for UCL for R-Chart (D4) 2 1.880 0 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.337 0.184 1.816 10 0.308 0.223 Part 2 The UCLR equals enter your response here seconds and the LCLR equals enter your response here seconds. (Enter your responses rounded to two decimal places.)
At Quick Car Wash, the wash process is advertised to take less than 8 minutes. Consequently, management has set a target average of 440 seconds for the wash process. Suppose the average range for a sample of 9 cars is 10 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process. Factors for calculating three-sigma limits for the x-chart and R-chart Size of Sample (n) Factor for UCL and LCL for x-chart (A2) Factor for LCL for R-Chart (D3) Factor for UCL for R-Chart (D4) 2 1.880 0 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.337 0.184 1.816 10 0.308 0.223 Part 2 The UCLR equals enter your response here seconds and the LCLR equals enter your response here seconds. (Enter your responses rounded to two decimal places.)
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
Related questions
Question
At Quick Car Wash, the wash process is advertised to take less than
8
minutes. Consequently, management has set a target average of
440
seconds for the wash process. Suppose the average range for a sample of
9
cars is
10
seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process.Factors for calculating three-sigma limits for the
x-chart
and R-chart|
Size of Sample (n)
|
Factor for UCL and LCL for
x-chart
(A2)
|
Factor for LCL for R-Chart
(D3)
|
Factor for UCL for R-Chart
(D4)
|
|
2
|
1.880
|
0
|
3.267
|
|
3
|
1.023
|
0
|
2.575
|
|
4
|
0.729
|
0
|
2.282
|
|
5
|
0.577
|
0
|
2.115
|
|
6
|
0.483
|
0
|
2.004
|
|
7
|
0.419
|
0.076
|
1.924
|
|
8
|
0.373
|
0.136
|
1.864
|
|
9
|
0.337
|
0.184
|
1.816
|
|
10
|
0.308
|
0.223
|
|
Part 2
The
UCLR
equals
enter your response here
seconds and the
LCLR
equals
enter your response here
seconds. (Enter your responses rounded to two decimal places.)Expert Solution
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