Sawmill Simulation Model for Maximizing Log Yield Values

A method for computing the sawmill log breakdown sequence that results in maximum yields is presented. The sequence of cuts made on the head rig ultimately depends on the values of the lumber thus obtained. Therefore, the strategy of the model is to compute the resulting, values from various cutting sequences and choose the cutting sequence that corresponds to the largest total value. “Parameters of Choice” describes the possible options that the sawyer has for breaking down the log. Each time a parameter of choice is chosen, other parameters, describing the sequence of cuts, follow as a consequence. These are referred to as “Parameters of Consequence.” The simulation model applies to nominal 12-inch Douglas-fir (Pseudotsuga menziesii) logs. Computations are illustrated by means of an example. The purpose of the model is to investigate the sensitivity of value yield to parameters such as saw kerf, thickness of lumber, and width of lumber.

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