Canadian Forest Service Publications
User’s manual for TIMRET: a micro-computer program for silviculture investment analysis. 1995. Ondro, W.J.; Marshall, W. Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, Edmonton, Alberta. 17 p.
Issued by: Northern Forestry Centre
Catalog ID: 19030
This manual describes the usage of a micro-computer software package, TIMRET (TIMber RETurns), which was developed to aid the forest manager in evaluating profitability of silvicultural investments. Returns from a range of investment scenarios, e.g., forest renewal, cleaning, spacing, thinning, release, fertilization, and tree improvements, can be calculated and compared by using any of the following criteria: 1) internal rate of return, 2) present net worth, 3) profitability index, and 4) benefit/cost ratio. TIMRET calculates returns from treatment costs, and benefits such as increased yield, size premiums, logging cost reductions, and product from trees removed by treatment. The output of the financial analysis can be presented in a tabular or graphical form. Examples of these inputs and examples of TIMRET calculations are provided.