Heard the term 4PL? It refers to the generation of logistics providers beyond 3PLs, known as integrators. More simply put, it can mean an entire supply chain, end to end. The concept is the latest rage in supply chain management theory. Here’s an Industry Week interview on it that’s worth reading. For the harder core procurement fanatics, try reading this audacious Harvard Business Review article from 2004 by SCM guru and Stanford professor Haul Lee.