Does anyone know about the difference between Topsis and Vikor method? I know these methods are different in normalized method. Unlike the Vikor method, Topsis examines both distances from negative and positive ideal choices. How can I find that the results of which method is corrected? I used these methods (Topsis and Vikor) for prioritization of my choices.
I think this paper can adequately answer your question:
Article Compromise solution by MCDM methods: a comparative analysis ...
I think this paper can adequately answer your question:
Article Compromise solution by MCDM methods: a comparative analysis ...
1) Both of these methods belong to the same group of MADM methods, but they are based on different algorithms.
2) VIKOR as well as TOPSIS takes into consideration negative aspects of evaluation through R value (minimum individual regret) so this cannot be considered as difference.
But to answer (or not) to your question related to selection of more appropriate MADM method for problem solving. There is just no simple answer to that question, as it is raised so many times. You cannot say which method is better if they are yielding different results applied to the same problem, simply because you do not have a reference point for comparison of methods. The only thing that you can be sure about is that there are differences between methods. Generally speaking, the problem that you are solving is the one which will determine preferred method. In order to do so, you have to be familiar with different methods and their specificity.
So, I gave you a rather philosophic answer, certainly the one you did not hope for. But that is the reality.
Best luck in your work.
The VIKOR differ from TOPSIS in term of aggregation function and normalization method. In TOPSIS, the alternative which is too far from negative solution and nearest to positive solution is selected as best alternative. This may like to have a decision which not only makes as much profit as possible but most suitable for avoid the risk as much as possible. Besides, computing the best alternative in the VIKOR is based on the exacting measure of “closeness” to the PIS.
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