When is a system's architecture typically decided?

A system's architecture is typically decided throughout the project as understanding emerges because Agile methodologies emphasize adaptive planning and iterative development. This flexible approach allows teams to refine the architecture based on continuous feedback, changes in requirements, and insights gained during development. As teams build functionality and gather insights about user needs and technical challenges, they can make informed decisions about the architecture, leading to a more effective and accommodating design.

This ongoing refinement acknowledges that initial assumptions about a system's structure may change as the project progresses, making it crucial to remain adaptable and responsive to new information rather than adhering strictly to a predetermined design. Such an approach promotes better alignment with user needs and technical feasibility, ensuring that the final architecture is both practical and resilient.