Rule 3 is used to handle the case that all of the experts have assigned weak side values with different confidence degrees. In this case, it
can be seen that the experts have an agreement on the weak side weighting, and most of them show high confidence in making the decision.
Therefore, the smaller weighting with higher confidence is adopted as the integrated weighting, and the confidence degree is set to “S”.
Table 3 shows an illustrative example of integrating the opinions of five experts with this rule. By assuming that the test item is “Solve the
equation 2X þ 4 ¼ 6,” and the experts are asked to provide the weighting value for describing the relationship between the test item and
concept C2 “Equation”. In this illustrative example, all of the experts have assigned the weak side value, while three of them (E1, E3, and E4)
have confidence and two of them (E2 and E5) have low confidence to represent the same relationship; therefore, the integrated weighting is
1 by finding the minimum of values 1, 1 and 2, and the integrated confidence degree is “S” (Sure). Other rules that are similar to this rule are
given as follows: