Table 1.
Summary of Literature.
Table 2.
The evaluation scales.
Table 3.
The determined challenges and explanations.
Table 4.
The group direct-relation matrix Z.
Table 5.
The normalized direct-relation matrix D.
Table 6.
The total-relation matrix T.
Table 7.
r, c, (r + c) and (r-c) matrices.
Table 8.
T matrix colored based on the threshold: 0.4632 (*).
Fig 1.
Cause and Effect Diagram.
Fig 2.
IRM based on the threshold: 0.4632.
Fig 3.
The importance degree of challenges.