The phrase "managed services" is used so broadly in vendors' marketing literature that it has become difficult for buyers to distinguish these services from other kinds of outsourcing or understand their value proposition. To help tech marketers focus their messaging, Forrester characterizes managed services as having a one-to-many, standardized service delivery model with a relatively small labor component and offers examples of how to articulate the value of these offerings. We break the segments down into network, voice, IT infrastructure, security, and application management, providing a quick list of key competitors in each subsegment.