Abstract: A method for predicting flow properties of a material such as a pharmaceutical powder, which material is proposed for processing in a system that requires good flow properties for its successful operation. The method includes identifying key flow points along the system and, for each key flow point so identified, characterizing the type of flow occurring at that key flow point and selecting a flow test relevant for modeling the type of flow occurring at that key flow point. A plurality of material samples are selected as being candidates for processing in the system, wherein each material sample has a different composition, blend or concentration of ingredients. For each key flow point and for each material sample, the flow type characterizing the key flow point is modeled by conducting the specific flow test selected for that key flow point.