5. Devise the indicator’s importance weights: In order to deter- mine the indicators’ importance weights, the fuzzy assessment matrix to be analyzed, and consequently, the entries in the fuzzy assessment matrix are converted into crisp values. However, for this, some appropriate calculation procedures should be followed.
For this reason, we used Chang's Extent Analysis method. The method has been well accepted in literature in determining the importance weights for the fuzzy input pair wise assessment matrix [93,94]. The details of essential calculations of the Extent Analysis method as described by [94–96] are given in an Appendix A.