Research on the Design of Accompanying Products for the Mentally Retarded Elderly Based on AHP

Table 2

Judgment matrix scale table.

Scale	Meaning
1	Indicates that two factors are equally important compared to each other
3	Indicates that the former is slightly more important than the latter when compared to the two factors
5	Indicates that the former is significantly more important than the latter when compared to the two factors
7	Indicates that the former is more strongly important than the latter when compared to the two factors
9	Indicates that the former is more extremely important than the latter when compared to the two factors
2, 4, 6, 8	Median of the above two adjacent judgments
Inverse	Judgment Yij for comparison of factor i with j, then judgment Yji = 1/Yij for comparison of factor j with i