| Score | Definition | Description |
| 1 | Equally important | Two criteria are equally important in an objective research. |
| 3 | Fairly high important | Experiments indicate that the i importance is higher than j. |
| 5 | Highly important | Experiments indicate that the i importance is very higher than j. |
| 7 | Extremely high important | Experiments indicate that i importance is extremely higher than j. |
| 9 | Absolutely important | The very higher importance has been established. |
| 2, 4, 6, 8 | Average score between two adjacent judgement |
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