Systematic Research on the Application of Steel Slag Resources under the Background of Big Data

Table 2

Satty scoring system of 9 grades.

Scale	Meaning
1	Compared to the two factors, it is equally important
3	Compared to the two factors, the former is a little more important than the latter
5	Compared to the two factors, the former is significantly more important than the latter
7	Compared to the two factors, the former is more important than the latter
9	Compared to the two factors, the former is extremely important than the latter
2, 4, 6, 8	The intermediate value of the above judgment
Reciprocal	The importance of the comparison of the corresponding two factors in the exchange sequence