Journal: International Journal of Forest Engineering

Abbreviation

Publisher

Taylor & Francis

Journal Volumes

ISSN

1494-2119
1913-2220

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2023 - 20242
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Publications 1 - 2 of 2
  • Optimization of forest harvest scheduling at the operational level, considering precedence relationship among harvesting activities
    Item type: Journal Article
    Arora, Rohit; Sowlati, Taraneh; Mortyn, Joel; et al. (2023)
    International Journal of Forest Engineering
    The competitiveness of forest companies is strongly affected by the costs associated with getting the raw material to the mills. As harvesting costs contribute significantly to this cost, mathematical programming models were developed to optimize the scheduling of harvest activities within and between cut blocks to reduce the overall cost. However, the precedence relationship between harvesting activities occurring concurrently across multiple cut blocks has not been considered in the existing literature. In this paper, a mixed-integer linear programming model is developed to optimize the scheduling of harvesting activities, considering the precedence relationship among harvesting activities. The objective of the model is to minimize the total costs. The model determines the start time and end time of each harvesting activity at each cut block, considering the movement time of machines between cut blocks. The model is applied to the case of a large forest company in British Columbia, Canada. The model’s harvesting cost is only 1.37% higher than the lowest possible harvesting cost, and only 3 assigned machines have an idle time. The detailed harvesting schedule is generated based on the start time, the end time, and the operating time for each activity at each cut block.
  • Virtual forests: a review on emerging questions in the use and application of 3D data in forestry
    Item type: Review Article
    Murtiyoso, Arnadi; Holm, Stefan; Riihimäki, Henri; et al. (2024)
    International Journal of Forest Engineering
    Digital 3D technologies are emerging methods for recording and visualizing forests. Therefore, it is not surprising that these technologies have seen many applications and developments in recent years. In this study, we conducted a comprehensive review of existing 3D technologies within the context of forestry and how they interact with users and stakeholders. We present a summary of the requirements, visualization, and application of virtual forests. This includes an overview of state-of-the-art 3D reconstruction and visualization tools, which have seen a major increase in interest in the past few years, as evidenced by a preliminary analysis on research keywords. Based on the reviewed studies, we present the current trend and emerging questions, as well as challenges in the field of virtual forests. Further, we discuss the identified trends and challenges related to data acquisition, along with existing and potential future interactions between the 3D data and more specific demands from the forestry sector. We conclude that the use of digital 3D data in forestry is on the rise and that such novel methods show great potential and merit further attention.
Publications 1 - 2 of 2