Requirements analysis and definition

Requirements analysis and definition are concerned with discovering and detailing the specific requirements of a system—what the system needs to allow users to do with it. Users obviously includes end users, ranging from office workers using the system to conduct day-to-day business, to external end users such as customers. Less obviously, users should also include system administrators, staff who receive data from the system through some reporting processes, and perhaps any number of other people who interact with the system in any fashion, or who are acted upon by it—including the developers themselves.