1. Architecture in the Life Cycle Stakeholder engagement models

2. Architecture in Agile Projects Agile Software Development

3. Architecture in Agile Projects How much Architecture? Up-front work vs. Agility – trade off between Up-front design work on the architecture and up-front risk identification, planning, and resolution work Rework due to fixing defects and addressing modification request.

4. Architecture in Agile Projects Agility and Architectural Methods A successful architecture is resilient and loosely coupled. It is composed of a core set of well-reasoned design decisions but still contains rooms that allow modifications to be made and refactorings to be done, without ruining the original structure, An effective agile process will allow the architecture to grow incrementally as the system is deployed and matures. The key to success is to have decomposability, separation of concerns, and near-independence of the parts. To be agile, the architecture should be visible and self-evident in the code; this means making the design patterns, cross-cutting concerns, and other important decisions obvious, well communicated, and defended. Large amount of architecture work up front for large and complex system with relatively stable and well-understood requirements. For big projects with vague or unstable requirements, start by a quickly designing a complete candidate architecture, and be prepared to change and elaborate the architecture as circumstances dictate.