This is a fundamental operation in most engineering disciplines related to human interaction: reducing the system (the designer's PoV) to a particular path thro

This is a fundamental operation in most engineering disciplines related to human interaction: reducing the system (the designer's PoV) to a particular path through that system (the user's PoV), constrained by cognitive capabilities of the user. The designer sees a graph of entities and relationships, the user only needs to navigate it with the least effort. This is applicable to everything, from the structural design of a rocket (a structural engineer only needs the specs and the load profile for the specific part, not the entire rocket internals) to videogame level design (different paths taken by players through a location).