@misc{Bury_Hanna_Effective_2011, author={Bury, Hanna and Wagner, Dariusz W.}, copyright={Creative Commons Attribution BY 4.0 license}, address={Warszawa}, journal={Raport Badawczy = Research Report}, howpublished={online}, year={2011}, publisher={Instytut Badań Systemowych. Polska Akademia Nauk}, publisher={Systems Research Institute. Polish Academy of Sciences}, language={eng}, abstract={In the paper a heuristic procedure of determining the Kemeny median is presented. It is assumed that all the alternatives are compared and ties may occur in experts’ opinions as well as in group rankings. The loss matrix is applied to derive the solution. Lower bound of a distance of a given ranking from experts’opinions is evaluated for the case of ties in group ranking. It is also shown that the procedure of determining the Kemeny median can be simplified by means of the analysis of the loss matrix.}, title={Effective solution of the Kemeny median. The case of ties in group ranking}, type={Text}, URL={http://rcin.org.pl/Content/144786/PDF/RB-2011-71.pdf}, keywords={Pairwise comparison matrix, Macierz porównania par, Group ranking, Ranking grupowy, Ties in group ranking, The kemeny median method, Więzi w rankingu grupowym, Metoda mediany kemeny}, }