GGP, Gozdno gospodarstvo Postojna d. o. o. had bought new forest skidder Woody140 in August 2012. With this purchase need for new data which would determine machines usefulness and effectiveness, was shown. Measurements in field were made in the area of Praprotna Draga at GGE Leskova dolina in Augustand September 2013. 90 cycles were made - 44 cycles up, 22 cycles down and 24 cycles on flat area. A snap - back method of time measuring was used while recording. Length and slope of the terrain was also recorded. Observing worker at work we determined he works effectively 84% of his working time. From all data collected we determined that Wody 140 is more suitable for work in our forests than his predecessor - Wody 110. Daily efficiency for Wody 140 for all 3 categories was also calculated.
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