Operational research (OR) is a powerful tool for decision-making in optimizing forestry production planning. Thus,the of this study is to use the OR to solve forest regulation problems in a natural forest of Araucariaangustifolia (Bertol) Kuntze. The proposal for better management regime for the forest consisted in the elaborationof two OR problems using integer linear programming (ILP). I – the first aiming to maximize income for eachregime; and the II – second aiming to define the best management alternative for three values of the De Liocourt qquotient of 1.1; 1.3 and 1.5, residual basal areas of 10.0, 12.0 and 14.0 m2.ha-1and cutting cycles of 20, 25 and 30years, creating thus 27 management scenarios. Despite the application of cutting cycles of 20, 25 and 30 years, themanagement alternative that best uses the resources and maximizes the income for this area of 84 ha, in themunicipality of Lages, SC, is “q” = 1.3 with residual basal area of 12 m2.ha-1for all cutting cycles. The removal ofthese trees in the forest will contribute to the maintenance of a future diametric structure, natural regeneration,species conservation and tree increment rate, as well as the maintenance of resources of the forest ecosystem.
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