| Variable | Symbol | Description |
| Level variable | A1, B1, C1 | First-level factor | Rate variable | R1, R2, R3 | Increment of first-level factor | Auxiliary variable | RCS | Supply chain resilience | Constant | A11, A12, A13, A14, A15, A16, A17, B11, B12, B13, B14, B15, B16, B17, B18, C11, C12, C13, C14 | Second-level factor | S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18 | Influence coefficient | QA1, QB1, QC1 | Weight of first-level factor | QA11, QA12, QA13, QA14, QA15, QA16, QA17, QB11, QB12, QB13, QB14, QB15, QB16, QB17, QB18, QC11, QC12, QC13, QC14 | Weight of second-level factor |
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