Table 8 Determined risk level corresponding to each component set.

From: An interpretable framework for risk management in TBM excavation using expert elicitation integrated with fuzzy set theory

Component set

Risk level

Impact class

Probability class

None [N]

None [N]

Negligible [N]

None [N]

Low [L]

Negligible [N]

None [N]

Medium [M]

Negligible [N]

None [N]

High [H]

Tolerable [T]

Low [L]

None [N]

Negligible [N]

Low [L]

Low [L]

Tolerable [T]

Low [L]

Medium [M]

Tolerable [T]

Low [L]

High [H]

Significant [S]

Medium [M]

None [N]

Tolerable [T]

Medium [M]

Low [L]

Significant [S]

Medium [M]

Medium [M]

Significant [S]

Medium [M]

High [H]

Intolerable [I]

High [H]

None [N]

Significant [S]

High [H]

Low [L]

Intolerable [I]

High [H]

Medium [M]

Intolerable [I]

High [H]

High [H]

Intolerable [I]