This deliverable explains a model-driven, iterative and test-driven methodology for developing adaptive systems using the DiVA tools and technologies. It covers the lifecycle from requirements analysis until deployment and consists of four main phases: 1. Requirements engineering 2. Modelling of the adaptation concerns 3. Modelling of runtime architecture 4. Transformation and deployment All of the phases and involved tools connect to form a coherent process, often involving semi- or fully automatic tool support where possible in the spirit of model-driven engineering. The DiVA methodology is concerned with developing the adaptive features of a system and is intended to be combined with existing tried-and-tested methodologies for development of the functional aspects of the software.