# SIMULATION

Use this command set to change:

1) Scenario Scenario name

2) Years Simulation years

3) YPC Years per cycle

4) CurrentYear Current calendar year

5) MODEL Settings / calibration.

## Scenario

Naming simulation scenarios is useful for managing results from many simulations. The scenario name is written in most OSM reports. A scenario name could be the stand-type for which the stand belongs or treatment applied to it. The scenario name does not affect OSM simulations. Example:

SIMULATION.Scenario “Shelterwood”

## Years and Years per Cycle (YPC)

OSM can handle unlimited simulation cycles and number of years per cycle can vary from 1 to 10; however, Variant models may override the years per cycle upper limit. Default settings for simulation years is 100 with one year per cycle; i.e., 100 cycles.

SIMULATION.Years 100

SIMULATION.YPC 1

## Aligning Simulation Cycles with the Current Year (CurrentYear)

When stated, stands are grown forward from their year of survey to the current year using annual cycles. From the current year on, years per cycle is respected and the stand is grown forward from this point for the total number of simulation years. For example, if a stand sample was collected in 2005, but your GIS inventory is updated to 2013, you may want to grow this stand forward to the current inventory year first and then project the stands forward from this common start year. To enable this, CurrentYear must be stated in a command (as below) and SurveyYear must be stated in your OSM_StandList input table. SurveyYear must be less than or equal to CurrentYear.

SIMULATION.CurrentYear 2013

## MODEL

Provides access to the stand model implemented by all Variants.

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### Examples

SIMULATION

Scenario “Select Cut”

Years 200

YPC 5

CurrentYear 2013

MODEL

…Model Specific Commands…