Production mgmt homework assignment | Operations Management homework help

Details of Assignment (W4): Complete problems 6.12, S6.11, S6.20, S6.23, S6.27, and S6.35 in the textbook.Submit one Excel file. Put each problem result on a separate sheet in your file. 

 (See upload for more details)

S6.11Twelve samples, each containing five parts, were taken

from a process that produces steel rods. The length of each rod in

the samples was determined. The results were tabulated and sample

means and ranges were computed. The results were:

SAMPLE

SAMPLE MEAN (in.)

RANGE (in.)

1

10.002

0.011

2

10.002

0.014

3

9.991

0.007

4

10.006

0.022

5

9.997

0.013

6

9.999

0.012

7

10.001

0.008

8

10.005

0.013

9

9.995

0.004

10

10.001

0.011

11

10.001

0.014

12

10.006

0.009

a) Determine the upper and lower control limits and the overall

means for x-charts and R-charts.

b) Draw the charts and plot the values of the sample means and

ranges.

c) Do the data indicate a process that is in control?

 

d) Why or why not? 

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