Due to feedback from several users, I revised the implementation of the power method for the calculation of the Eigenvector and Eigenvalue to improve the accuracy of my AHP excel template. The calculation sheet ‘8×8 in the workbook was completely reworked. My tests show a significant increase in accuracy. As an example see my updated post AHP template – numerical accuracy.
By default the number of iterations is now set to 12. The check value in sheet ‘8×8 cell B33 shows the sum of all matrix elements solving the Eigenvalue equation (A–I*λ) x = 0 with A the Decision matrix, λ = estimated principal Eigenvalue and x = estimated Eigenvector. The ideal check value is zero. With the example numbers given in the template the result is 5E-08.
Please let me know, if you find any problems in the new version.
For the download of the latest version please go to the AHP template download page .