Team Assignment: Quality
Part A: In-Flight Crew
Although Southwest Airlines looks to provide an enjoyable and relaxing flight experience for their passengers, unfortunately, not all passengers will be satisfied at all times. There has been numerous complaints to the airline regarding the interactions with the flight crew and the overall in-flight experience.
The quality control manager at SWA wants to understand the reasons why passengers may complain about the crew or in-flight experience. Help her out by building a cause-effect (or fishbone) diagram to identify as many reasons as possible for why there may be complaints about the in-flight experience. All charts should be created in Word (I do not want any hand-drawn charts).
Part B: Delayed Flights
Southwest Airlines is quite proud of their safety record and their timely departures and arrivals. In order to determine if there is a significant change in the number of flights delayed more than 30 minutes, For three months, Southwest Airlines randomly selected 100 flights per day and reported how many were delayed by more than 30 minutes. Here is the data collected:
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DATE
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DELAYED FLIGHTS
|
|
DATE
|
DELAYED FLIGHTS
|
|
DATE
|
DELAYED FLIGHTS
|
|
DATE
|
DELAYED FLIGHTS
|
|
DATE
|
DELAYED FLIGHTS
|
|
1-Sep
|
4
|
|
21-Sep
|
2
|
|
11-Oct
|
1
|
|
31-Oct
|
6
|
|
20-Nov
|
3
|
|
2-Sep
|
8
|
|
22-Sep
|
6
|
|
12-Oct
|
7
|
|
1-Nov
|
0
|
|
21-Nov
|
7
|
|
3-Sep
|
4
|
|
23-Sep
|
0
|
|
13-Oct
|
0
|
|
2-Nov
|
16
|
|
22-Nov
|
5
|
|
4-Sep
|
0
|
|
24-Sep
|
6
|
|
14-Oct
|
4
|
|
3-Nov
|
1
|
|
23-Nov
|
7
|
|
5-Sep
|
0
|
|
25-Sep
|
1
|
|
15-Oct
|
1
|
|
4-Nov
|
2
|
|
24-Nov
|
7
|
|
6-Sep
|
4
|
|
26-Sep
|
1
|
|
16-Oct
|
5
|
|
5-Nov
|
2
|
|
25-Nov
|
1
|
|
7-Sep
|
7
|
|
27-Sep
|
2
|
|
17-Oct
|
3
|
|
6-Nov
|
2
|
|
26-Nov
|
3
|
|
8-Sep
|
3
|
|
28-Sep
|
4
|
|
18-Oct
|
0
|
|
7-Nov
|
2
|
|
27-Nov
|
3
|
|
9-Sep
|
0
|
|
29-Sep
|
17
|
|
19-Oct
|
2
|
|
8-Nov
|
6
|
|
28-Nov
|
4
|
|
10-Sep
|
4
|
|
30-Sep
|
4
|
|
20-Oct
|
7
|
|
9-Nov
|
3
|
|
29-Nov
|
4
|
|
11-Sep
|
5
|
|
1-Oct
|
4
|
|
21-Oct
|
0
|
|
10-Nov
|
0
|
|
30-Nov
|
1
|
|
12-Sep
|
6
|
|
2-Oct
|
3
|
|
22-Oct
|
1
|
|
11-Nov
|
4
|
|
|
|
|
13-Sep
|
4
|
|
3-Oct
|
5
|
|
23-Oct
|
4
|
|
12-Nov
|
8
|
|
|
|
|
14-Sep
|
11
|
|
4-Oct
|
8
|
|
24-Oct
|
1
|
|
13-Nov
|
15
|
|
|
|
|
15-Sep
|
7
|
|
5-Oct
|
4
|
|
25-Oct
|
0
|
|
14-Nov
|
6
|
|
|
|
|
16-Sep
|
0
|
|
6-Oct
|
4
|
|
26-Oct
|
5
|
|
15-Nov
|
1
|
|
|
|
|
17-Sep
|
4
|
|
7-Oct
|
7
|
|
27-Oct
|
3
|
|
16-Nov
|
4
|
|
|
|
|
18-Sep
|
2
|
|
8-Oct
|
5
|
|
28-Oct
|
4
|
|
17-Nov
|
8
|
|
|
|
|
19-Sep
|
3
|
|
9-Oct
|
11
|
|
29-Oct
|
7
|
|
18-Nov
|
3
|
|
|
|
|
20-Sep
|
10
|
|
10-Oct
|
3
|
|
30-Oct
|
5
|
|
19-Nov
|
6
|
|
|
|
Use this sample to assess the quality of the airplane seats.
a. What type of control chart should be used here? Why?
b. What is the centerline of the chart? What is the lower control limit? The upper control limit?
d. What statistic should be plotted on the control chart for each sample?
e. Create a control chart. Copy and paste the control chart into your Word document.
f. Is this system under control?
g. What advice would you provide to the quality control engineer at Southwest?
Format your assignment according to the following formatting requirements:
1. The answer should be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides.
2. The response also includes a cover page containing the title of the assignment, the student's name, the course title, and the date. The cover page is not included in the required page length.
3. Also include a reference page. The Citations and references should follow APA format. The reference page is not included in the required page length.