Table 1.
Overview of the five defined steps involved in planning skid trails.
Fig 1.
Forester marking the end of a skid trail with a mobile geographic positioning system (planning step 4).
Photo: M. Werder, WSL. Published under a CC BY license.
Table 2.
Overview of the response and predictor variables included in the models.
Table 3.
Time required for planning tasks (n = 44).
PSH15 = productive system hours per hectare, including all interruptions <15 minutes.
Table 4.
The two planning methods (3 and 5) described most frequently by the participants (used as the basis for the groups formed for the regression analysis) and average values of the estimated time requirements.
PSH15 = productive system hours per hectare including all interruptions <15 minutes.
Table 5.
Total time required for the planning process under different terrain and stand conditions (n = 44).
PSH15 = productive system hours per hectare including all interruptions <15 minutes.
Fig 2.
Experience (left) and annual work volume (extent area, right) of the planners.
Table 6.
Model overview with predictors and key properties.
The models are written in the following way in R (example given for model 1a): log(Time_F) ~ Cond + log(STS) + PMS + log(Current_Pract) + FWA + Current_Pract:FWA. The following significance codes apply: ‘***’ P = 0–0.001;‘**’ P = 0.001–0.01;‘*’ P = 0.01–0.05; ‘.’ P = 0.05–0.1; ‘()’ P = 0.1–1.