An airport development plan (master plan) is a conceptual plan that covers all relevant parts of an airport (i.e. airside, terminal, landside, landside access system). As it derives from an unconstrained development concept it is a comprehensive planning approach that takes all restrictions and limitations into account. The development is based on the ultimate vision – i.e. the maximum development stage at the end of the development period – which it reflects in individual development phases (phased concept), thus ensuring the right capacity at the lowest possible investment costs for each specific development phase.