Part of Explaining the power of systems thinking practices using reference frames.
Project alphas nicely fit in a single mental reference frame (which, again, makes thinking quicker, more economical, and more reliable):
Every project lambda has its own sub-alphas, those sub-alphas have their own sub-alphas, and so on. All these breakdowns can be mental Reference frames, too.
By the way, I feel that There are no “horizontal”, mesh-like connections in reference frames of concepts.