Question
The time elapsed to install motorcycle gas tanks is measured. Six samples, each consisting of 18 observations have been gathered and analyzed. The results are
The time elapsed to install motorcycle gas tanks is measured. Six samples, each consisting of 18 observations have been gathered and analyzed. The results are in the table below. The standard deviation for the overall process is unknown. Sample Mean Range 1 5.06 0.28 2 5.14 0.43 3 4.96 0.29 4 5.08 0.35 5 4.93 0.39 6 4.99 0.53
a. Determine the upper and lower control limits for the mean and range charts.
Range Chart
UCL = ____
LCL = _____
Mean Chart
UCL = _____
LCL = ______
b. Plot the control charts and determine if the process is in control.
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Project Management A Systems Approach to Planning Scheduling and Controlling
Authors: Harold Kerzner
10th Edition
978-047027870, 978-0-470-5038, 470278706, 978-0470278703
