Common mistake in arch: Using functionality to id services ("Buying Stocks", "Selling Stocks", ...). Functional decomposition maximizes impact of change, is coupled to it. Better encapsulate change to insulate. Do not resonate with change.
Pavel Kurbatsky, 18, a first-year student at Moscow's Bauman State University, is creating a furor in innovative circles with his most recent invention: a walking cane and "talking" dark glasses that help blind people navigate unknown environments.