Decision support systems in wood procurement. A review.

Harstela, Pertti

doi:10.14214/sf.a8520

Cited by 11 publications

(8 citation statements)

References 13 publications

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“…Timber harvesting causes enormous disruption to the natural environment. Apart from tree damage, it also leads to degradation of the undergrowth, ground layer and soil [1][2][3][4][5][6][7][8][9]. In view of the increasing ecological and economic importance of damage occurring in stands during timber harvesting, many researchers have investigated the potential to reduce such damage [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Season of the Year on the Frequency and Degree of Damage during Commercial Thinning in Black Alder Stands in Poland

Grzywiński

Turowski²,

Naskrent

et al. 2019

Forests

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The aim of this study was to investigate the effect of season of the year on the frequency and degree of damage to residual trees caused during winter and summer timber harvesting operations in young alder stands. Analyses were conducted in pure black alder (Alnus glutinosa Gaertn.) stands aged 38 and 40 years, located in north-eastern Poland. Chainsaw logging was performed in the cut-to-length (CTL) system, while timber was extracted using an agricultural tractor with a trailer with manual timber loading and unloading. Damage caused in the stand as a result of early thinning operations was evaluated in terms of: (1) damage location, (2) wound size, (3) wound depth, and (4) the distance of the damaged tree from the skid trail. Timber harvesting caused damage in 8.3% of trees remaining in the stand. Both the total number of damaged trees (p = 0.001) and the number of trees damaged during felling (p = 0.01) and extraction of timber (p < 0.001) were greater in summer than in winter. Irrespective of the season, two-thirds of all cases of damage were caused during timber extraction, with 67.7% of damage recorded on trunks or root collars and 32.3% on roots. Irrespective of the season and the technological operation, slightly over 50% of cases of damage were small wounds of max. 10 cm 2 . The proportions of medium-sized wounds (11-100 cm 2 ) and large wounds (over 100 cm 2 ) were comparable. The majority of damaged trees (85.1%) were found in the vicinity (<1 m) of the skid trails. The frequency of tree damage near the skid trail was twice as large in summer as in winter (p < 0.001).

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Section: Introductionmentioning

confidence: 99%

The Effect of Season of the Year on the Frequency and Degree of Damage during Commercial Thinning in Black Alder Stands in Poland

Grzywiński

Turowski²,

Naskrent

et al. 2019

Forests

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“…This is thought to be a variable determined not mathematically through the internal functional balance of timber flows, but through the DMG's human judgments to alter scenarios. This kind of heuristic decision support is discussed in more detail by Robak (1990) and Harstela (1997).…”

Section: Discussionmentioning

confidence: 99%

“…Periodic linear programming (LP) has been used in model formulations of the forest industry (Harstela 1997). These models are similar in form to models based on system-orientated wood procurement modelling (Mykkänen 1994).…”

Section: Introductionmentioning

confidence: 99%

A Hierarchical Participatory Methodology for Tactical Decision-making Based on a Decision-analytic Model for Balancing Timber Stock

Palander

1999

SFOR

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A hierarchical participatory methodology for tactical decision-making based on a decision-analytic model for balancing timber stock.A methodology is presented which solves local management problems by combining a timber procurement model with decision analysis and heuristic optimization. A hierarchical participatory method resolves the difficulties of the timber-flow model based on dynamics and system balance theories applying to the tactical management process of policy selection. The methodology was developed for team/group decision-making on the assumptions of bounded rationality, imperfect mill service information and lagged inventory adjustment. The experiments analyze the logistics of timber-flow changes. Although the most important objective of the tactical policy of an organization has been to satisfy the timber demand of the mills at minimum cost, the work group in this study was also able to decide utilizing the criteria of the mill service: (1) local managers responsible for transportation preferred a larger roadside inventory stock; and (2) a manager responsible for supervision of logistics preferred a higher level of aggregate inventory turnaround. In the first participatory stage of the method, the criteria for aspiration levels, which determined the group managers' goal as a combined aspiration point, were described. In the second stage, to avoid problems, participatory inventory models and a decision boundary were used in the management process. In this tradeoff analysis, heuristics provided equal hierarchical consideration and commensurate goals. Since the experiments showed that consideration of local managers' needs in predicting feasible buffer stocks may reduce possible conflicts in decision-making, the applied theories and the methodology of this study were useful in establishing balanced policies for tactical management situations.

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“…Res. 14 (1999) Periodic linear programming (LP) has been used in model formulations of the forest industry (Harstela 1997). These models are similar in form to models based on system-orientated wood procurement modelling (Mykkiinen 1994).…”

Section: Introductionmentioning

confidence: 99%

“…However, whatever methods are used, the effectiveness of a decision-making group (DMG) largely depends on how well an organization's technology fits its environment and the group's structure (Sauter 1997). Furthermore, since local management is a participation process which should involve two local hierarchical levels of decision-makers, methods should accommodate a human behaviour approach (Harstela 1997). So far, logistic considerations have taken a single decision-maker approach.…”

Section: Introductionmentioning

confidence: 99%

A Hierarchical Participatory Methodology for Tactical Decision-making Based on a Decision-analytic Model for Balancing Timber Stock

Palander

1999

Scandinavian Journal of Forest Research

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of Forest ResearchFinland). A Izierarclzical yartic@atory ~~zetlzodology jor tactical decision-nzaking based on a decisior~ -arzalytic model for halancing tir~zber stock.A methodology is presented which solves local management problenls by combining a timber procurement model with decision analysis and heuristic optimization. A hierarchical participatory method resolves the difficulties of the timber-flow model based on dynamics and system balance theories applying to the tactical management process of policy selection. The methodology was developed for teamlgroup decision-making on the assumptions of bounded rationality, imperfect mill service information and lagged inventory adjustment. The experiments analyze the logistics of timber-flow changes. Although the most in~portant objective of the tactical policy of an organization has been to satisfy the timber demand of the mills at minimum cost, the work group in this study was also able to decide utilizing the criteria of the mill service: (I) local managers responsible for transportation preferred a larger roadside inventory stock; and (2) a manager responsible for supervision of logistics preferred a higher level of aggregate inventory turnaround. In the first participatory stage of the method, the criteria for aspiration levels, which determined the group managers' goal as a combined aspiration point, were described. In the second stage, to avoid problems, participatory inventory models and a decision boundary were used in the management process. In this tradeoff analysis, heuristics provided equal hierarchical consideration and commensurate goals. Since the experiments showed that consideration of local managers' needs in predicting feasible buffer stocks may reduce possible conflicts in decision-making, the applied theories and the methodology of this study were useful in establishing balanced policies for tactical management situations.

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Decision support systems in wood procurement. A review.

Cited by 11 publications

References 13 publications

The Effect of Season of the Year on the Frequency and Degree of Damage during Commercial Thinning in Black Alder Stands in Poland

The Effect of Season of the Year on the Frequency and Degree of Damage during Commercial Thinning in Black Alder Stands in Poland

A Hierarchical Participatory Methodology for Tactical Decision-making Based on a Decision-analytic Model for Balancing Timber Stock

A Hierarchical Participatory Methodology for Tactical Decision-making Based on a Decision-analytic Model for Balancing Timber Stock

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