Research Article
Prioritising Actions for Improving Classroom Air Quality Based on the Analytic Hierarchy Process: Case Studies in China and the UK
Table 2
The fundamental scale for pairwise comparison [
44].
| | Intensity of importance | Definition | Explanation |
| | 1 | Equal importance | Two activities contribute equally to the objective | | 3 | Weak importance of one over another | Experience and judgment slightly favour one activity over another | | 5 | Essential or strong importance | Experience and judgment strongly favour one activity over another | | 7 | Demonstrated importance | An activity is strongly favoured and its dominance demonstrated in practice | | 9 | Absolute importance | The evidence favouring one activity over another is of the highest possible order of affirmation | | 2, 4, 6, 8 | Intermediate values between the two adjacent judgments | When compromise is needed | | Reciprocals | If activity has one of the above nonzero numbers assigned to it when compared with activity , then has the reciprocal value when compared with |
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