Due to the high cost of acquisition and preservation of machines used in the operations of forest harvest, it is necessary to know the profitability of its purchase and up to what point its usage is profitable. Thus the aim of this work was to evaluate economically the activities of felling and timber extraction held by skidders harvester and forwarder up to approximately 30,000 hours of work. Seventeen forest machines were used: 5 harvesters John Deere model 1270D, and 5 harvesters John Deere model 1470D, with power of 215 hp (160 kW) and 241 hp (180 kW), respectively, and 7 forwarders John Deere model 1710D, with power of 215 hp (160 kW). The data base supplied by a forestry company located in the state of Minas Gerais, Brazil, containing all the necessary information to obtain the equilibrium point, the annual equivalent cost (AEC) and the internal return rate (IRR) was used. The equilibrium point was used to determine the amount of minimum hours the machines should work. The AEC was used to determine the profitability of the operation. In 2013 it was not possible to find a number of working hours that did not cause loss for either the harvester or the forwarder. The substitution point for the harvester or the forwarder through the AEC was not found. The harvester presented investment profitability in 2011 of 67.43%. The forwarder presented an internal rate or return of 34.00% in 2011.
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机译：由于森林收获运营中使用的机器的高成本和保存的高成本，有必要了解其购买的盈利能力，并达到其使用的盈利能力。因此，这项工作的目的是经济地评估由Skidders Harvester举办的砍伐和木材提取的活动，以及转发大约30,000小时的工作。使用了17种林机：5个收割机John Deere Model 1270D，5个收割机John Deere Model 1470D，分别为215千桶（160千瓦）和241惠普（180千瓦），7代John Deere Model 1710D，具有权力215 HP（160 kW）。由位于巴西Minas Gerais州的林业公司提供的数据库，其中包含了获得均衡点的所有必要信息，使用年度等效成本（AEC）和内部回波率（IRR）。平衡点用于确定机器应该工作的最短时间的量。 AEC用于确定操作的盈利能力。 2013年，无法找到一些没有导致收割机或转发器损失的工作时间。找不到收割机或转发器通过AEC的替换点。收割机在2011年提出了67.43％的投资盈利能力。转发器在2011年提出了内部税率或返回34.00％。
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