Production Performance Appraisal Rating for Reservoir Management Units Based on Fuzzy Clustering

Table 1

The quantity scale of 0.1∼0.9.

Scale value	Definition	Explanation
0.5	Equally important	Two elements compared, equally important.
0.6	Slightly important	Two elements compared, an element is more slightly important than another element.
0.7	Obviously important	Two elements compared, an element is more obviously important than another element.
0.8	Much more important	Two elements compared, an element is much more strongly important than another element.
0.9	Extremely important	Two elements compared, an element is more extremely important than another element.
0.1, 0.2, 0.3, 0.4	Converse comparison	If the 𝑢𝑖 is compared with 𝑢𝑗, get the judgment value 𝑎𝑖𝑗, then 𝑢𝑗 is compared with 𝑢𝑖, the judgment value is 𝑎𝑗𝑖=1−𝑎𝑖𝑗.