Flash crystallization is a newly developed process to produce small, fine crystals from solutions of rather well soluble substances. Since the suitability of a substance depends largely on nucleation and growth kinetics, not all combinations of solute and solvent are applicable to this process. Therefore, a simple and fast method to check the suitability of a system is presented. As a first step, an overview about the crystallization behavior of the solute‐solvent systems is gained by measuring induction times. Furthermore, a model is presented that enables the design of flash experiments for different process parameters. Finally, an analysis of the product suspension allows for the evaluation of a solute‐solvent system with regard to the feasibility of the flash crystallization process.