Here is a short piece by Stewart Brand
on pace layers - an idea he developed in his book How Buildings Learn. He proposes six layers - all of which have a distinctive tick rate. The image above is a re-drawn illustration of the six layers and their relationships. His summary;
Fast learns, slow remembers. Fast proposes, slow disposes. Fast is discontinuous, slow is continuous. Fast and small
instructsslow and big by accruedinnovation and by occasional revolution. Slow and big controls small and fast by constraint and constancy. Fast gets all our attention, slow has all the power.