The ILA involves aero-hydro-servo-elastic analyses that can account for the coupled dynamics of a Bottom-founded Offshore Wind Turbine including the RNA, control system, tower, substructure, and foundation modelled and solved simultaneously in the time domain. In contrast to the sequential analysis methods, the ILA accounts for the coupling effects and damping effects including aerodynamic and hydrodynamic damping in a consistent manner. It can provide a more rational calculation of global motions and loads for the detailed design evaluation of the RNA components, tower, substructure, and foundation. The software tools for ILA should be compatible with the modelling approaches for individual components of a Bottom-founded Offshore Wind Turbine and the load transfer strategy for detailed design evaluations for each component.