ch. 6s - 5

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 ?

Refer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. 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 R Hour R Hour R Hour R 19 1 2 7 8 3 9 3.15" 3.10 3.32 3.49 2.97 2.76 0.71" 1.23 1.38 1.21 1.22 0.32 3.15" 2.55 3.02 2.85 2.83 2.87 0.53" 1.18 0.71 1.28 1.17 0.40 13 14 15 16 17 18 3.01" 2.83 3.02 2.74 2.76 2.74 0.90" 1.26 1.06 0.50 1.48 1.24 4.51" 2.79 2.75 3.38 3.04 2.54 1.56" 1.04 1.13 0.46 1.53 0.92 20 21 22 23 24 4 10 11 12 5 6 Based on the sampling done, the control limits for 3-sigma x chart are (round all intermediate calculations to three decimal places before proceeding with further calculations)