BP deals with processes for doing activities, which are done *to* things [people, equipment, orders, products, cash]. SD deals with the things themselves, which flow into, out of, and between states [the stocks]. Almost all of BP therefore describes the processes that are undertaken to influence those flows – hiring people, developing products,processing orders, collecting cash – and efficient processes make that happen fast [or slow if it’s a rate we want to limit]. Some simple examples of resource structures to which BP ...