The break-in-slope method is a simple-although powerful-data analysis technique that is commonly used to determine the power absorption profiles of the plasma species during auxiliary heating experiments in tokamaks. It is based on the study of the energy response of the particles to sudden changes in the external power applied to the plasma. Even though some experimental conditions are favorable for the straightforward application of the break-in-slope analysis in its most simple form (linear fit of the experimental temperature signals), most situations require the retention of additional terms in the linearized energy conservation equation for a successful use of this technique. These corrections include density and radiated power variations, the saturation of the temperature and density signals before and after the power break and the possible time delays between the power change and the energy response of the particles. The latter is particularly important for indirect (collisional) heating processes, while the other corrections play a crucial role in low absorption scenarios and/or single power step studies, where the standard break-in-slope analysis usually leads to integrated power levels well below the actual power injected into the plasma.