On what basis are tree risk assessments often completed?

Tree risk assessments are predominantly based on observations, experience, and training because they utilize the firsthand knowledge and skills of trained professionals who can visually inspect trees and interpret their condition, structure, and surrounding environment. This practical approach allows assessors to identify signs of potential risks, such as decay, structural weaknesses, or signs of disease that may not be apparent through purely theoretical or algorithm-driven approaches.

For example, experienced arborists rely on their training to recognize subtle indicators of risk that can arise from the tree's growth patterns or interactions with environmental factors. This experiential knowledge is crucial in assessing the likelihood of tree failure and the consequences that may ensue, thereby providing a comprehensive assessment that considers both the immediate and long-term implications for the surrounding area and community.

In contrast, while data-driven algorithms and scientific research can contribute valuable insights and support the risk assessment process, they typically cannot substitute the nuanced understanding gained from direct observation and professional experience. Community feedback can also play a role in understanding public concerns about specific trees but does not replace the technical assessments carried out by trained individuals who have the expertise to make informed evaluations based on established criteria and protocols.