Think of a relay race. In a great team, each runner starts moving before the baton arrives, matching speed so the handoff is seamless, and the whole team runs faster than four individual sprints ever could. Supply chains work the same way. When companies, departments, and partners share plans and information, products flow faster, inventory shrinks, and customers get what they want without the waste. This chapter shows how to build those smooth handoffs – inside your own firm, with suppliers, with customers, and even with competitors – and what keeps so many chains from becoming truly integrated.