Canadian Forest Service Publications

LOGPLAN II: A model for planning logging and regeneration activities. 1991. Newnham, R.M. Forestry Canada, Petawawa National Forestry Institute, Chalk River, Ontario. Information Report PI-X-102E. 38 p.

Year: 1991

Available from: Pacific Forestry Centre

Catalog ID: 10626

Language: English

Series: Information report (Petawawa)


LOGPLAN II is a linear-programming (LP) based model that can be used as a tool in formulating a forest company's annual operating plan. Given the resources of wood, equipment, and planting stock that are available, the model schedules harvesting and regeneration activities in such a way that the cost of meeting mill demands is minimized. The model can be used to test a number of different planning strategies to ensure that the most effective is selected. The development of LOGPLAN since the mid-1970s is outlined. Formulae are given for the objective function and the constraints that may be imposed on the harvesting system. The method of constructing a flowchart for the system is illustrated using "Hypothetical Forest Company" as an example. Required data are entered interactively on a computer terminal and stored in tabular form on computer files that can be used for making corrections or changes. The LP input matrix is generated automatically from these files using FORTRAN programs. Optimization is accomplished using the XMP software package. The procedure for running the different programs to complete an analysis is described. Examples of input tables and output reports are given for the Hypothetical Forest Company.