The objective of the research is to come up with a multiscale model to explain the anisotropic growth of CsPbBr3 nanocrystals which have applications as quantum dots, LEDs, optoelectronics. The novelty of the model is to chiefly capture the interplay between kinetic growth of the crystal and thermodynamic equilibrium during the crystal growth in the direction of quantum confinement. This phenomenon is the characteristic of Perovskite Lead Halide family which makes the quantum confinement a function of size and shape. A rational explanation of the phenomenon is coveted in the scientific community and thus a multsicale model integrating a Kinetic Monte Carlo simulation and differential equations is being conducted to replicate the experimental results and capture the anisotropic crystal growth phenomenon. Finally, the developed model will be used to design a model-based controller to produce the CsPbBr3 nanocrystals with a desired size and shape distribution.