The island-wide slope management system consists of risk evaluation in two stages: strategic level risk assessment (SLRA) and tactical level risk assessment (TLRA).

The SLRA stage places slopes within a global risk matrix based on slope failure’s impact and risk derived from desk studies and site inspections. This first stage study will heuristically identify critical slopes to be assessed with greater resolution in the next stage.

In the following TLRA stage, the identified slopes are evaluated based on limit equilibrium analyses to fine-tune and quantify the global risk levels allowing engineers to work with a unified and systematic risk mitigation tool to identify and evaluate slope stabilization measures.