Factors of the GSL Modelling System

  • Resource allocation linear programming model.
  • Methodology to set up and run LP allows data “gaps” to be filled.
  • Concept of diminishing returns is important when dealing with resources.
  • Average vs. marginal change to determine the “tipping point” for all inputs.
  • Detail is required to identify the tipping point.
  • Averaging destroys detail and encourages waste of resources.
  • Economic and environmental outcomes almost always coincide.
  • Models require transparency for farmer credibility and acceptance.
  • No “one result” is the answer to any complex systems question.
  • Risk and objectives of analysis need to be assessed.
  • GSL model.
  • Background.
  • New generation modelling.
  • Easy and transparent inputs.
  • Outputs are detailed and each result “tab” links to produce an overall understanding of what; how; why the result has occurred.
  • Combination and use of new technologies and programs.
  • LP is ideal for complex systems solving but it is the conceptual thinking required to visualise and articulate the system that has been the restraint on its wider use.
  • Examples of specific use:
  • Economic effect of GHG capping on farms (MAF Policy)
  • Economic impact of varying GHG emission price on commercial farms (MAF Policy)
  • Economics of N reduction on dairy Farms (DairyNZ).
  • Management options for N reduction on specific dairy farms (DairyNZ).
  • The value of a specified irrigation system to the increased profit of a large multi system farm enterprise (Private farm company SI).
  • New management options for LUDF with regard to improving economic outcomes and capping emissions. (DairyNZ/LUDF civic board).

Extract: Factors of GSL: Resource Planning Model
LP is ideal for complex systems solving but it is the conceptual thinking required to visualise and articulate the system that has been the restraint on its wider use.


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