Wood procurement in the pressure of change.

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dc.contributor.author Rummukainen, Arto
dc.contributor.author Alanne, Heikki
dc.contributor.author Mikkonen, Esko
dc.date.accessioned 2011-07-26T13:21:06Z
dc.date.available 2011-07-26T13:21:06Z
dc.date.issued 1995
dc.identifier.citation Acta Forestalia Fennica. 1995. 248: 1-98. fi
dc.identifier.issn 0001-5636
dc.identifier.uri http://hdl.handle.net/10138/27280
dc.description.abstract Linear optimization model was used to calculate seven wood procurement scenarios for years 1990, 2000 and 2010. Productivity and cost functions for seven cutting, five terrain transport, three long distance transport and various work supervision and scaling methods were calculated from available work study reports. All method's base on Nordic cut to length system. Finland was divided in three parts for description of harvesting conditions. Twenty imaginary wood processing points and their wood procurement areas were created for these areas. The procurement systems, which consist of the harvesting conditions and work productivity functions, were described as a simulation model. In the LP-model the wood procurement system has to fulfil the volume and wood assortment requirements of processing points by minimizing the procurement cost. The model consists of 862 variables and 560 restrictions. Results show that it is economical to increase the mechanical work in harvesting. Cost increment alternatives effect only little on profitability of manual work. The areas of later thinnings and seed tree- and shelter wood cuttings increase on cost of first thinnings. In mechanized work one method, 10-tonne one grip harvester and forwarder, is gaining advantage among other methods. Working hours of forwarder are decreasing opposite to the harvester. There is only little need to increase the number of harvesters and trucks or their drivers from today's level. Quite large fluctuations in level of procurement and cost can be handled by constant number of machines, by alternating the number of season workers and by driving machines in two shifts. It is possible, if some environmental problems of large scale summer time harvesting can be solved. fi
dc.language.iso en fi
dc.publisher The Society of Forestry in Finland - The Finnish Forest Research Institute fi
dc.subject tulevaisuudentutkimus fi
dc.subject skenaariot fi
dc.subject puuvarat fi
dc.subject tuottavuus fi
dc.subject puunhankinta fi
dc.subject logging fi
dc.subject linear programming fi
dc.subject models fi
dc.subject simulation fi
dc.subject evaluation fi
dc.subject forest resources fi
dc.subject productivity fi
dc.subject forecasting fi
dc.subject wood procurement, future scenarios, productivity, cost fi
dc.title Wood procurement in the pressure of change. fi
dc.title.alternative Resource evaluation model till year 2010. fi
dc.type Artikkeli fi
dc.identifier.laitoskoodi SMS fi

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