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Operations Mgmt With Std Dvd Problem

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Computer upgrades have a nominal time of 80 minutes. Samples of five observations each have been taken, and the results are as listed.;SAMPLE;1 2 3 4 5 6;79.2 80.5 79.6 78.9 80.5 79.7;78.8 78.7 79.6 79.4 79.6 80.6;80.0 81.0 80.4 79.7 80.4 80.5;78.4 80.4 80.3 79.4 80.8 80.0;80.8 80.1 80.8 80.6 78.8 81.1;Factors for three-sigma control limits for and R charts;FACTORS FOR R CHARTS;Number of Observations in Subgroup;n Factor for;Chart;A2 Lower;Control Limit;D3 Upper;Control Limit;D4;2 1.88 0 3.27;3 1.02 0 2.57;4 0.73 0 2.28;5 0.58 0 2.11;6 0.48 0 2.00;7 0.42 0.08 1.92;8 0.37 0.14 1.86;9 0.34 0.18 1.82;10 0.31 0.22 1.78;11 0.29 0.26 1.74;12 0.27 0.28 1.72;13 0.25 0.31 1.69;14 0.24 0.33 1.67;15 0.22 0.35 1.65;16 0.21 0.36 1.64;17 0.20 0.38 1.62;18 0.19 0.39 1.61;19 0.19 0.40 1.60;20 0.18 0.41 1.59;a. Using factors from above table, determine upper and lower control limits for mean and range charts.(Round your intermediate calculations and final answers to 2 decimal places. Leave no cells blank - be certain to enter "0" wherever required.);Mean Chart Range Chart;UCL;LCL;b. Decide if the process is in control.;Yes;No

 

Paper#35254 | Written in 18-Jul-2015

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