Who’s the one person in your team you simply can’t afford to lose? It’s okay - every business has one: some expert, savant, or otherwise indispensable worker who holds projects together like glue. People like these are called Subject Matter Experts. They are those from whom we elicit those requirements that are not always explicitly stated. These people are incredible assets—until they are no longer with the business…and then they become a liability. Guest Post By Edgar Wilson.