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Matti Kärkkäinen

Runkojen järeys puunkorjuun monitoimikoneiden ajanmenekin ennustamisessa.

Kärkkäinen M. (1973). Runkojen järeys puunkorjuun monitoimikoneiden ajanmenekin ennustamisessa. Silva Fennica vol. 7 no. 1 article id 4874. https://doi.org/10.14214/sf.a14704

English title: The size of stems in estimating the time consumption of processors.


The problem considered in this paper is how to analyse the usefulness of some average volume values of stems in predicting the average time consumption of some processors. In this connection, the usual arithmetic mean, the arithmetic mean weighted with volume and the geometric mean were used. The functions describing the dependence of time consumption per tree on the volume of the tree were obtained from previous studies, as were the stand properties.

The results were obtained with the aid of computer simulation techniques and the deterministic model described above. According to the results, the usual arithmetic mean is very applicable for predicting the time consumption. The geometric mean is nearly as good, or in some cases even better. However, as a rule its computation is much more tedious than that of the arithmetic average volume for the purpose.

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Original keywords
ajanmenekki; aikatutkimus; hakkuukoneet; monitoimikoneet; järeys; läpimitta; hakkuu

English keywords
time consumption; volume of the stem; processors; logging; time studies

Published in 1973

Available at https://doi.org/10.14214/sf.a14704 | Download PDF

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