CADD process—for example: - studying protein-ligand binding - modeling mechanisms for drug action. [[Density Functional Theory (DFT)]] has played a pivotal role in drug design as a quantum-mechanical method that can be applied to chemically and biologically significant molecular systems at a fairly low computational overhead. QC to augment DFT in this context but rather to augment it in tackling larger and more complex systems at greater levels of accuracy than are currently attainable.