Table 1.

AHP assessment scale

No. 1	A has absolute importance	A has very strong importance	A has strong importance	A has weak importance	Equal importance	B has weak importance	B has strong importance	B has very strong importance	B has absolute importance	No. 2
	1/9	1/7	1/5	1/3	1	3	5	7	9
Head comfort			○
Neck comfort				○