Officials at Mountain Airlines are interested in monitoring the length of time customers must wait in line to check in at their airport counter in Reno, Nevada. To develop a control chart, five customers were sampled each day for 20 days. The data, in minutes are presented in CHECKN.xlsx. Conduct a capability analysis for the process. Management has specified a USL of 5 minutes. Is the process capable? Justify your answer. Why didn't management provide a LSL? Construct the X-bar chart for the waiting process.
Officials at Mountain Airlines are interested in monitoring the length of time customers must wait in line to check in at their airport counter in Reno, Nevada. To develop a control chart, five customers were sampled each day for 20 days. The data, in minutes are presented in CHECKN.xlsx. Conduct a capability analysis for the process. Management has specified a USL of 5 minutes. Is the process capable? Justify your answer. Why didn't management provide a LSL? Construct the X-bar chart for the waiting process.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Cp = (USL -LSL)/(6*standard deviation) = (5-0)/(6*2.189756) = 0.380555
Cp is less than 1.0, so process is not capable.
Standard deviation is calculated using stdev function in excel.
Since the data is about wait time for a customer, the company would target to achieve 0.0 wait time. So, LSL is not given.
X-bar chart:
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