The functional framework of FAST, which C. Bytheway originally published in 1971, has been widely employed in several variants in Value Engineering, but is not common in TRIZ. However, the original, logically consistent and unabbreviated form Bytheway originally proposed can be an instructive way to model a landscape of functions that can be used in TRIZ for a variety of purposes. Among these are landscaping the functions of the system and its super systems, including neighbouring systems and subsystems, thus depicting a system in new coordinates. In contrast to Function Analysis, possible ways of functional integration and evolution of a system can be modelled and explained; moreover, the technique constitutes a creativity tool and a strategic tool indicating disruptive innovations.