  Pedestal modelling is crucial to predict the performance of future fusion
devices. Current modelling efforts suffer either from a lack of kinetic
physics, or an excess of computational complexity. To ameliorate these
problems, we take a first-principles multiscale approach to the pedestal. We
will present three separate sets of equations, covering the dynamics of Edge
Lo- calised Modes, the inter-ELM pedestal, and pedestal turbulence,
respectively. Precisely how these equations should be coupled to each other are
covered in detail. This framework is completely self-consistent; it is derived
from first principles by means an asymptotic expansion in appropriate small
parameters. The derivation exploits the narrowness of the pedestal region, the
smallness of the thermal gyroradius, and the low plasma $\beta$ typical of
current pedestal operation to achieve its simplifications. The relationship
between this framework and gyrokinetics is analysed, and possibilities to
directly match this framework onto multiscale gyrokinetics are explored. A
detailed comparison between our model and other models in the literature is
performed. Finally, the potential for matching this framework onto an
open-field-line region is discussed.
