Hi,

I hope you are doing well.

I am using Interpretive structural modeling (ISM) and need to build a

“reachability matrix” to use it as the input for “ISM” package. In ISM

method, the opinion of some experts should be collected. For example,

attached image includes matrices which show opinions of four experts about

relationship of A1, A2, and A3 together. To integrate these matrices

together, I should use The geometric mean of experts’ opinions. In the

Yeh’s paper wrote that:

*“The geometric mean of experts’ opinions on the relationship between a

pair of criteria (sub-criteria) was **calculated. Set the threshold value

0.50 which represents that more than 50% of the experts determine the

interrelationship. If the value of the element is less than 0.50, the value

is counted as 0”.*

Ref:

http://dx.doi.org/10.3846/20294913.2015.1071293My question is: How should I calculate geometric mean of experts’ opinions

in example attached matrices? In other words, I do not know how should I

calculate geometric mean. I read some papers, but could not clearly

understand.

Many thanks!

With best regards,

--

*Mehdi Dadkhah*

PhD candidate & Research assistant

Department of Management, Faculty of Economics and Administrative Sciences,

Ferdowsi University of Mashhad, Mashhad, Iran

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