Schematic light curve of the Yohkoh/BCS Ca XIX channel flux during a flare. Expectations for distribution of evaporated and accumulated plasma components are shown for both the light curve (I_evp and I_acm) and the line profile (φ_evp and φ_acm). Cartoons at the bottom show a model of the flare heating process in multiple loops. The sizes of circles located at the individual loop apexes correspond to the total input energy.