Suppose you constructed control charts for the time spent by customers in a retail checkout lane, computing UCL, CL, and LCL based upon a large number of historical observations. Using those control limits, you decide to plot the most recent 12 data points as shown below. Given the following range chart, which general conclusion is most appropriate? Sample Range 140 120 100 80 60 40 20 0 1 Range Chart The process is capable O The process is not capable The process is in control O The process is out of control 5 6 7 Sample Number 8 9 10 11 12
Suppose you constructed control charts for the time spent by customers in a retail checkout lane, computing UCL, CL, and LCL based upon a large number of historical observations. Using those control limits, you decide to plot the most recent 12 data points as shown below. Given the following range chart, which general conclusion is most appropriate? Sample Range 140 120 100 80 60 40 20 0 1 Range Chart The process is capable O The process is not capable The process is in control O The process is out of control 5 6 7 Sample Number 8 9 10 11 12
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Suppose you constructed control charts for the time spent by customers in a retail checkout
lane, computing UCL, CL, and LCL based upon a large number of historical observations.
Using those control limits, you decide to plot the most recent 12 data points as shown
below. Given the following range chart, which general conclusion is most appropriate?
Range Chart
Sample Range
140
120
100
80
60
40
20
0
1
2
3
The process is capable
The process is not capable
O The process is in control
O The process is out of control.
5
6 7
Sample Number
8
9 10 11 12
Transcribed Image Text:Using the chart from the previous question, what is a more usable conclusion?
O Houston, we have a problem
Variability in checkout times has recently been lower than usual
O Average checkout times have recently been faster than usual
The process is getting worse
Average checkout times have recently been slower than usual
O Variability in checkout times has recently been larger than usual
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