In contracts about complicated services, the hardest terms to draft appear in statements of work. SoWs for large projects demand long lists of duties from the vendor. And usually they’re interwoven with supporting tasks from the customer and its other suppliers, along with countless contingencies, assumptions, and exceptions. Putting all those pieces into an effective contract challenges the best drafters. The result is often hundreds of pages of baffling mess. Yet the path to good drafting is simple: write outcome-driven descriptions. In other words, describe the technology the vendor will create or run or both, and then stop typing.