Mechanism Analysis of the Impact of COVID-19 on the Whole Process of Aircraft Turnaround Operations

Table 7

Statistical indexes of the duration time of subprocesses on critical path 2 before and after COVID-19.

Indexes (min)	Before				After
	Avg	Std dev	Max	Min	Avg	Std dev	Max	Min
Turnaround time	61.5	7.61	79	49.3	70.2	8.87	88.3	56.4
De-boarding	8.6	1.24	11.6	5.9	6.7	1.53	9.3	3.9
Catering	21.0	6.27	36.4	9.5	26.4	7.74	48.7	15.1
Boarding	19.7	5.29	33.6	10	27.2	9.66	60.9	14.9