Use SPC with the following table of data to advise this airline about its ontime arrival and departure performance. These are service qualities highly valued by their customers. The average total number of flights flown by this airline is 660 per day. This represents three weeks of data. It is suggested that a late flight be considered as a defective. Draw up a p-chart and analyze the results. Discuss the approach.

The number of late flights (NLF) each day

Assuming that days 1, 8, and 15 are Mondays; 2, 9, and 16 are Tuesdays, etc., Use the concepts from chapter on forecasting to determine if there is any correlation between day of the week and the number of late flights.

Transcribed Image Text:

Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 NLF 31 56 65 49 52 38 47 43 39 41 37 48 45 33 22 34 29 31 35 44 37