Different Evaluations of Motor-Manual Wood Harvesting Processes on the Basis of Conjoint Analysis

Nacrtak The aim of this paper was the conjoint analysis of wood harvesting processes performed using motor-manual methods. Distribution of the characteristics consisted of nine features, based on the results of multidimensional scaling, which were aggregated into two groups: ergonomic (5) and technological (4). The scope of research was limited to four wood harvesting processes. The cuts were carried out in selected 100-year old spruce stands on the steep terrain (13–30°) in the Beskid ̄ywiecki Mts. The value of utility function was defined on the basis of normalized eigenvectors for the comparison matrix. The weight of the features was defined on the basis of the Tytyk (2001) simplified method of rank aggregation by preserving the maximum values (for ergonomic issues), the Satty method of subjective assessment and the partially determined stochastic factors (for technological issues). The results of the calculations indicate the occurrence of dominant preferences within two groups of factors and their mutual polarization. The results of the total evaluation indicate disappearance of the strong dominance of alternatives.