ABSTRACT: Rainfall-induced slope failures are common problems in steep residual soil slopes in the tropics. The characteristics of water flow, pore-water pressure changes, and shear strength of soils are the main parameters associated with slope stability analysis involving unsaturated soils which are directly affected by the flux boundary condition (infiltration, evaporation) at the soil-atmosphere interface. Procedures for slope stability analyses considering unsaturated-saturated soils as an integral system are presented. The paper also highlights procedures and the importance of characterizing soil properties, flux boundary conditions, spatial and temporal variability of pore-water pressures and instrumentation for slope stability assessment. It has also been shown through examples how these procedures can be used to generate stability assessment charts for local slopes under local environmental considerations