A review of tactical planning models

In tactical forest management planning, the decisions required to meet the strategic plan are made, and these include: i) scheduling of spatially explicit harvest-blocks; ii) construction of a road-network required to access these blocks; and iii) transportation costs within the tactical forest planning area (hereafter only referred to as transportation costs) that emerge from the first two decisions. These three decisions are interdependent and should therefore be integrated in any optimization model. At present, this integration is not fully made. This is because: i) the integrated model is NP-hard, and exact solutions are not feasible for large and medium-sized forests; and ii) metaheuristic search algorithms, which can be used on larger forests, have not integrated transportation costs realistically.The economic consequences of not integrating transportation costs into tactical planning models has not been quantified and evaluated by researchers; and the objective of this paper is to fill this gap in knowledge. To this end, an exact solution approach is used to solve and compare two integrated models: i) a model in which transportation costs are included in the objective function, and b) a model in which transportation costs are excluded from the objective function. The models were applied to three forests ranging in area from 6628 to 19,677 ha.Results show that: i) the model which included transportation costs yielded solutions with major reductions in both transportation and total costs; and ii) that, as the forests to which the model was applied tripled in area (from 6628 ha to 19,677 ha), the percent reduction in total costs increased disproportionately – more than fivefold (from 3.9% to 21%). These results are important, for they indicate that the integration of transportation costs into a tactical planning model is of major economic consequence.

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Local factors and time‐variable parameters in tactical planning models: A tool for adaptive timber procurement planning

Scandinavian Journal of Forest Research ◽

10.1080/02827589509382903 ◽

1995 ◽

Vol 10 (1-4) ◽

pp. 370-382 ◽

Cited By ~ 14

Author(s):

T. Palander

Keyword(s):

Time Variable ◽

Tactical Planning ◽

Variable Parameters ◽

Local Factors ◽

Planning Models ◽

Procurement Planning

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Tactical planning models for managing container flow and ship deployment

Maritime Policy & Management ◽

10.1080/03088839.2011.597447 ◽

2011 ◽

Vol 38 (5) ◽

pp. 487-508 ◽

Cited By ~ 27

Author(s):

Xinxin Liu ◽

Heng-Qing Ye ◽

Xue-Ming Yuan

Keyword(s):

Tactical Planning ◽

Planning Models

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UNIFICATION OF STANDS SELECTION FOR FINAL FELLING IN STRATEGIC AND TACTICAL PLANNING

Proceedings of the 7th International Scientific Conference Rural Development 2015 ◽

10.15544/rd.2015.071 ◽

2015 ◽

Author(s):

Ainārs GRĪNVALDS

Keyword(s):

Strategic Planning ◽

Net Present Value ◽

Strategic Plan ◽

Regression Function ◽

Tactical Planning ◽

Present Value ◽

Black Alder ◽

Value Maximization ◽

Annual Changes ◽

Selection For

The stand selection for cutting in tactical planning should be done according to the same principles like in strategic planning – to maximize net present value. The simple way of how to transfer the net present value maximization principle from strategic planning to tactical planning was created in Sweden. The method is based on annual changes in the net present value by postponing final felling. Forest inventory data and forestry modelling system was used for calculation of changes in net present value for pine, spruce, birch, aspen and black alder stands. And changes in net present value were described by regression function with factors from stand parameters. The regression function allows calculating annual changes in net present value for each stand. And stands with higher decrease in net present value have higher cutting priority. Stands selected for the final felling in strategic plan were compared with the stands selected in tactical plan with two methods, first, by using annual changes in the net present value, second, by traditional planning principles. Stands selected by annual changes in the net present value were similar to stands that were selected for cutting in strategic plan, but stands selected by traditional planning principles – not.

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