The applicability of the scoring rules (see below) has also been simplified and adapted from the European Union and Norway to the whole of the OECD. The more or less objective inputs concern the shares of different supply and demand categories (i.e. for supply: oil, gas, coal, nuclear, RES and other; for demand: industrial use, residential use, tertiary use and transport use) and the values characterising efficiency, adequacy, and reliability in conversion and transport based on the secondary energy carriers (electricity, gas, heat, and transport fuels). Figure 2.12 displays the conceptual framework of, and the elements considered in, the overall S/D Index model.