Western Airlines merged with a smaller airline recently. Every day since the merger, a random sample...

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General Management

Western Airlines merged with a smaller airline recently.Every day since the merger, a random sample of 30 Western flightshas been analyzed. A flight that takes off more than 10 minutesafter its scheduled departure time is considered to be late;otherwise, it is not late. Western’s performance over the past 10days is shown in the table below.

               Day1 2 3 4 5 6 7 8 9 10

# Late Flights 4 2 5 9 2 3 3 1 2 8

(I) What type of control chart would we use to monitorthis process?

( Circle 1 ) (a) X-bar chart (b) R-chart (c) p-chart (d)c-chart

(II) And why? Since the sample size is given and thedata is collected on regular basis (daily), therefore, p-chart mustbe used.

(III) What are 2-sigma control limits for thisprocess?

(IV) Is the process in control, after you plot andanalyze the Control charts? Why/Why not?


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