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EN
We decided to use the PROMETHEE method to rank selected types of investment funds offered on the Polish market. In our deliberations, we took an interest in the investor with a certain aversion to risk who chooses from among treasury securities or stable growth funds. We took into consideration whole ranking lists made for half-yearly periods from 2010 to 2012 instead of the specific objects pointed by model. We decided to check whether, among investment products of interest to us, there are stable relationships over time arising from their ranking positions that allow to identify regular groups of leaders and outsiders. Moreover, we checked the influence of the fund size measured by the value of its assets on its ranking position.
PL
Preferencje decydenta określane są w metodzie PROMETHEE za pomocą wag. Dokładne określenie ich wartości nastręcza jednak znacznych trudności, przez co wprowadzany jest czynnik niepewności względem ostatecznych rankingów. W artykule tym badany jest wpływ losowych zaburzeń wag kryteriów na stabilność rankingów w zależności od struktury wyjściowej macierzy ocen porównywanych obiektów. W tym celu przeprowadzone zostały trzy eksperymenty symulacyjne przy użyciu specjalnie przygotowanego pakietu R. Wyniki badań wykazały, że im silniej skorelowane są ze sobą kryteria ocen, tym ostateczne rankingi są mniej wrażliwe na wahania wartości wag. Dodatkowo wykazano brak statystycznych zależności pomiędzy doborem obiektów a stabilnością rankingów metody PROMETHEE.
EN
The way how decision-maker’s preferences are described is the one of most important source of uncertainty in PROMETHEE method. In this paper analyzed how random disruption of weights influence on stability of complete ranking. Stochastic simulation was used. Computations was made in R. The results shows dependency between stability and structure of evaluation matrix. If criteria was more correlated each other, stability was higher. Moreover, there was no statistical evidence on dependency between stability and correlation of objects.
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