Rapid application design becomes a part of your day to day process with DevOps. As well as project teams of developers, testers and operations, your architects and designers join the conversation to build the architecture with each functional block and guide the developers into the best patterns and caution design constraints.
As for Enterprise Architecture, DevOps works well with a Pace-Layered approach to architecture. For Systems Of Innovation, DevOps provides speed, closed feedback loop and time to market. For Systems Of Differentiation, DevOps provides a focus on embedded quality and for Systems of Record provides the operational stability required.