Determine the pieces of precision-cut wire


Assignment:

Sampling 4 pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results:

Hour   Xbar   R    Hour   Xbar    R     Hour  Xbar   R     Hour  Xbar    R
1      3.15   0.76   7      3.15   0.53   13   3.21   0.80   19   3.31   1.66
2      3.10   1.13   8      2.65   1.08   14   2.83   1.31   20   2.99   1.14
3      3.12   1.48   9      2.92   0.76   15   3.12   1.01   21   2.65   1.03
4      3.49   1.31   10     2.85   1.28   16   2.74   0.55   22   3.28   0.41
5      3.17   1.22   11     2.93   1.17   17   2.86   1.43   23   2.94   1.63
6      2.86   0.37   12     3.07   0.35   18   2.84   1.34   24   2.54   0.92

Based on the sampling done, the control limits for 3-sigma x overbarx chart are (round all intermediate calculations to three decimal places before proceeding with further calculations):

Upper Control Limit (UCL Subscript x overbarUCLx)

Lower Control Limit (LCL Subscript x overbarLCLx)

Based on the x overbarx-chart, the wire cutting process has been

IN CONTROL or OUT OF CONTROL

The control limits for the 3-sigma R-chart are (round all intermediate calculations to three decimal places before proceeding with further calculations):

Upper Control Limit (UCL Subscript Upper RUCLR)

Lower Control Limit (LCL Subscript Upper RLCLR)

Based on the R-chart, the wire cutting process has been

IN CONTROL or OUT OF CONTROL

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Operation Management: Determine the pieces of precision-cut wire
Reference No:- TGS02961747

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