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

Table 8

Statistical indexes of the duration time of subprocesses on critical path 3 before and after COVID-19.

Indexes (min)	Before				After
	Avg	Std dev	Max	Min	Avg	Std dev	Max	Min
Turnaround time	67.1	9.35	48.8	84.9	74.8	7.88	87.2	64.3
Baggage unloading	6.9	2.95	14.3	3.4	7.4	4.21	18.2	4.1
Cargo unloading	18.7	8.40	37.3	4.4	27.9	13.41	48.1	10.6
Cargo loading	18.8	11.09	42.1	1.6	17.6	8.40	31.8	3.7
Baggage loading	10.5	8.74	43.6	4.3	9.7	5.62	22.6	2.9