| Empirical Criteria | Identified unstable gradations (%) | Unstable gradations not identified | Potentially unstable with unstable performance (either in laboratory tests or in-situ at dams) |
| Kenney-Lau method [15] [16] | 75 (82a) | S7, S10, Mr19 | 56 (69a) |
| Li-Fannin adaptation [27] | 67 (73a) | S7, S10, Mr19, S | 67 (89a) |
| Burenkova method (zone I or III) [17] | 58 (55a) | S7, S10, Mr3, CG3, A | 47 (55a) |
| Wan-Fell adaptation (>5% probability) [22] | 8 (9a) | S7, S10, Mr3, Mr19, C-20, C-30, A, L, N, P, S | 50 (50a) |
| Wan-Fell alternative method [28] | 0 | S7, S10, Mr3, Mr19, C-20, C-30, A, L, Pb | 0 |