Some previous conversions are not practical. For example, when converting radioactive decay model. The fuzzy solutions become negative which is not practical to represent number of particles.
An improved way to work with these problems is to apply the sup-J extension principle for interactive fuzzy numbers. See here an excellent article that considers the fuzzy radioactive decay model.
Article Fuzzy differential equations with interactive derivative
I have come to meet people from other area of expertise. They do recommend to go out and find experimental data before trying to extend the existing model (classical) into fuzzy environment.