Prioritising Actions for Improving Classroom Air Quality Based on the Analytic Hierarchy Process: Case Studies in China and the UK

Table 3

Random index (RI) values.

Number of criteria	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
RI	0.0	0.0	0.52	0.89	1.11	1.25	1.35	1.40	1.45	1.49	1.52	1.54	1.56	1.58	1.59