Identification and Assessment of Subway Construction Risk: An Integration of AHP and Experts Grading Method

Table 7

Schedule delay grade standard.

Level	A	B	C	D	E
Long-term project	The delay is greater than 9 months	Delays range from 6 to 9 months	Delays range from 3 to 6 months	Delays range from 1 to 3 months	Delay of less than one month
Short-term project	The delay is greater than 90 d	The delay is greater than 60∼90 d	The delay is greater than 30∼60 d	The delay is greater than 10∼30 d	The delay is less than 10 d