|Abstract or Summary
- The Northwest timber industry is in a transition to a smallwood
harvest environment. As the Northwest moves to smaller average
diameter stands log values have decreased and harvest costs have
increased. In an effort to increase profitability, Northwest
loggers are beginning to "mechanize". The profitable operation of
a mechanized harvest system is sensitive to changing market and
stand variables. Because of this there is an increased need for
strategic planning by land and business managers. Computers are
an efficient tool for performing the repetitive and often tedious
calculations involved in harvest system analysis. Computers also
enable analysts to perform sensitivity analysis and answer "What
This report identifies the existing personal computer-based
software capable of performing as an analysis tool for Northwest
timber harvest operations. It evaluates each by comparing them to
a specific set of evaluation criteria after running each using
four example harvest systems. The three harvest operation
analysis programs evaluated by this paper are : LOGSIM (Wiese
1987), The Harvest System Analyzer, HSA (Hendricks et.al. 1986),
and The Auburn Harvesting Analyzer, AHA (Tufts et.al. 1985).
The following conclusions were drawn upon competition of the
analysis. All three programs can be used to model harvest
operations in the Pacific Northwest, yet.none will meet the needs
of planners at all level5.
HSA and AHA make assumptions that do not accurately reflect
harvest methods used in the Pacific Northwest, therefor L.OGSIM is
the only program that can be recommended for modeling Pacific
Northwest harvest systems.
L.OGSIM's use is limited by its sophistication, long solution
times, and limited sources for detailed input data, particularly
production data for mechanized harvesting equipment. For this
reason more production data needs to be collected and the
currently available data centralized.
Finally after making the above observations it must be concluded
that, the application of computer-based harvest system analysis
in the Pacific Northwest, has not progressed to a point where it
is available for use other than by skilled analysts.