This chapter proposes a new and efficient heuristic algorithm to solve the problem of hierarchical production of limber in sawmills. The proposed solution is based on Mixed-Integer Linear Programming (MILP), using Benders’ decomposition and Lagrangean relaxation techniques The proposed methodology achieves a higher computational efficiency than the state of the art for the solution of this kind of problems. Key Words: Planning, Hierarchical, Production, Forestry, Industrial Sector.