Slope mass rating (SMR) is a rock mass classification scheme developed by Manuel Romana to describe the strength of an individual rock outcrop or slope. The system is founded upon the more widely used RMR scheme, which is modified with quantitative guidelines to the rate the influence of adverse joint orientations (e.g. joints dipping steeply out of the slope).
The SMR app is a tool for calculating slope mass rating index based on the discrete method developed by Romana in 1993, and also continuous approach suggested by Tomás et al. in 2007.