An Extended GRA Method Integrated with Fuzzy AHP to Construct a Multidimensional Index for Ranking Overall Energy Sustainability Performances

Round 1

Reviewer 1 Report

In this paper, an analysis of energy sustainability performances of 35 OECD member countries is undertaken using a new extended version of the grey relational analysis method, integrated with the fuzzy analytic hierarchy process. To this aim, the authors developed a new composite index. The paper is well-written, methodologically clear and I liked the two-step normalization procedure proposed by the authors for the instances when a set of values is considered optimum instead of a single value.

This revised version is improved compared to the initial submission. All my previous suggestions for revising the manuscript have been adequately dealt with, and I have no further recommendations.

Reviewer 2 Report

The paper examines usage of grey relational analysis method in integrated with the fuzzy AHP method in the process of energy sustainability index (OESI) building. Authors decide to use AHP method during preference modelling stage (weights of criteria)  while GRA is used for ranking alternatives. The proposed GRA method includes  revisions and extensions to precisely meet the goals of overall energy sustainability. Practical analyses is performed for comparing the performances of 35 OECD member countries. Research problem is well defined. Motivation for using fuzzy MCDA methodology is clear. Evaluation model provided by authors is comprehensive, results are interesting.Proposed approach and results gives strong contributions in the subject under investigation.

Thus I suggest accept the paper.