Which type of tree risk assessment evaluates risk using a rating combined in a matrix?

The type of tree risk assessment that evaluates risk using a rating combined in a matrix is qualitative tree risk assessment. This method focuses on categorizing and ranking risks based on subjective criteria, such as visual inspection and the experience of the assessor. The qualitative assessment typically uses a matrix format to combine parameters like likelihood of failure and potential consequences resulting from that failure, allowing for a straightforward visualization of risk levels.

Using a matrix helps practitioners convey complex information in a clear, organized manner, facilitating decision-making regarding tree management and risk mitigation strategies. This approach enables arborists to prioritize actions based on calculated risk levels, which is essential in effective tree management.