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Question 2: Alabama Airlines provides commuter service. As a product of airline deregulation, Alabama Air joined the growing number of short-haul, point-to-point airlines, including Lone Star, Comair, Atlantic Southeast, and Skywest. Alabama Air was started and managed by two former pilots, David Douglas and Michael Hanna. One of Alabama Air's top competitive priorities is on-time arrivals. The airline defines "on-time" to mean any arrival that is within 20 minutes of the scheduled time.

Question 2: Alabama Airlines provides commuter service. As a product of airline deregulation, Alabama Air joined the growing number of short-haul, point-to-point airlines, including Lone Star, Comair, Atlantic Southeast, and Skywest. Alabama Air was started and managed by two former pilots, David Douglas and Michael Hanna. One of Alabama Air's top competitive priorities is on-time arrivals. The airline defines "on-time" to mean any arrival that is within 20 minutes of the scheduled time.

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Question 2: Alabama Airlines provides commuter service. As a product of airline deregulation, Alabama Air joined the growing number of short-haul, point-to-point airlines, including Lone Star, Comair, Atlantic Southeast, and Skywest. Alabama Air was started and managed by two former pilots, David Douglas and Michael Hanna. One of Alabama Air's top competitive priorities is on-time arrivals. The airline defines "on-time" to mean any arrival that is within 20 minutes of the scheduled time. Mike Hanna decided to personally monitor Alabama Air's performance. Each week for the past 30 weeks, Hanna checked a random sample of 100 flight arrivals for on-time performance. The table that follows contains the number of flights that did not meet Alabama Air's definition of on time: Sample (Week) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 -- 15 Late Flights 2 4 10 4 1 1 13 9 11 0 3 4 2 2 8 Sample (Week) 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Late Flights 2 3 7 3 2 3 7 4 3 2 2 0 1 3 4 a) In this case, which quality control chart(s) will be appropriate for quality control and improvement? b) Construct the control chart(s) you have specified in part (a). c) Using the control chart(s) you have constructed in part (b), Mike continues to monitor the operations performance in the next five weeks. He samples the flights and observes that the number of late flights are 11, 9, 4, 12, and 8, respectively. What can Mike report about the quality of service: Is the process overall in control during these five weeks?
Transcribed Image Text:Question 2: Alabama Airlines provides commuter service. As a product of airline deregulation, Alabama Air joined the growing number of short-haul, point-to-point airlines, including Lone Star, Comair, Atlantic Southeast, and Skywest. Alabama Air was started and managed by two former pilots, David Douglas and Michael Hanna. One of Alabama Air's top competitive priorities is on-time arrivals. The airline defines "on-time" to mean any arrival that is within 20 minutes of the scheduled time. Mike Hanna decided to personally monitor Alabama Air's performance. Each week for the past 30 weeks, Hanna checked a random sample of 100 flight arrivals for on-time performance. The table that follows contains the number of flights that did not meet Alabama Air's definition of on time: Sample (Week) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 -- 15 Late Flights 2 4 10 4 1 1 13 9 11 0 3 4 2 2 8 Sample (Week) 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Late Flights 2 3 7 3 2 3 7 4 3 2 2 0 1 3 4 a) In this case, which quality control chart(s) will be appropriate for quality control and improvement? b) Construct the control chart(s) you have specified in part (a). c) Using the control chart(s) you have constructed in part (b), Mike continues to monitor the operations performance in the next five weeks. He samples the flights and observes that the number of late flights are 11, 9, 4, 12, and 8, respectively. What can Mike report about the quality of service: Is the process overall in control during these five weeks?
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