# Application of Linear Goal Programming

Decision Variable:

Xij = acres of stand class I managed under management regime j. Constraints:

Natural stands under 30 years old must be final harvested within 30-50 years old No thinning of natural stands was allowed

Current plantations less than 30 years old had to be final harvested within the next 15 years Thinning were allowed in current plantations only if age, site index, volume, and basal area criteria where met Real constraints:

Timber-class acreage constraint

Harvesting constraint

Economic constraint

Goals:

Volume harvested

Undiscounted cash flow

Discounted cash flow

Discounted cost goal

Reaction to the model formulation:

1. The attaining the weights for each of the goals were not clear. 2. The modeller may not include the product of the positive and negative deviational variables to be equal to zero. 3. The inequality in the acres harvested and in the volume harvested doesn’t make sense. 4. The goals are not clear enough. It must be explained further. 5. The constraints for the stands age and when it should be harvested were not included in the model itself.

Application of Linear Goal Programming to Forest Harvest Scheduling Paper Review

Decision Variable:

Xij = acres of stand class I managed under management regime j. Constraints:

Natural stands under 30 years old must be final harvested within 30-50 years old No thinning of natural stands was allowed

Current plantations less than 30 years old had to be final harvested within the next 15 years Thinning were allowed in current plantations only if age, site index, volume, and basal area criteria where met Real constraints:

Timber-class acreage constraint

Harvesting constraint

Economic constraint

Goals:

Volume harvested

Undiscounted cash flow

Discounted cash flow

Discounted cost goal

Reaction to the model formulation:

1. The attaining the...

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