Which control chart is appropriate to analyze the above data? Justify your answer
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South Africa Airways would like to monitor its airline’s performance. Each week for the past 20 weeks, they checked each week a random sample of 100 flight arrivals for “one-time” performance. The table that follows contains the number of flights that did not meet South Africa Airways definition of “one time”:
|
Week |
Late flights |
|
1 |
2 |
|
2 |
4 |
|
3 |
10 |
|
4 |
4 |
|
5 |
1 |
|
6 |
1 |
|
7 |
13 |
|
8 |
9 |
|
9 |
11 |
|
10 |
0 |
|
11 |
3 |
|
12 |
4 |
|
13 |
2 |
|
14 |
2 |
|
15 |
8 |
|
16 |
2 |
|
17 |
3 |
|
18 |
7 |
|
19 |
3 |
|
20 |
2 |
- Which control chart is appropriate to analyze the above data?
- Justify your answer
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