In the context of calculations of the electronic structure of materials, the coherent potential approximation is frequently combined with the Korringa–Kohn–Rostoker (KKR) formulation of density functional theory (DFT) to describe the electronic structure of systems with lattice-based disorder, such as substitutional alloys and magnetic materials at finite temperature. The KKR formulation of DFT is also sometimes referred to as multiple scattering theory (MST). When the KKR formulation of DFT is combined with the CPA, it is sometimes referred to as the KKR-CPA.