In Disciplined Agile (DA), the three common phases across project life cycles areInception, Construction,andTransition. These phases reflect the iterative and incremental approach of agile methodologies tailored to suit varying contexts.

Inception: This phase is about getting things started properly. It includes initial planning activities such as defining the vision, developing a preliminary project plan, identifying stakeholders, securing funding, and setting up the initial environment.

Construction: This phase focuses on developing a consumable solution in a series of iterations. The team builds, enhances, and evolves the solution to ensure that it meets stakeholders' needs while remaining aligned with the overarching vision and goals.

Transition: The transition phase ensures that the solution is ready for delivery to the end-users or stakeholders. This includes final validation and verification activities, user training, deployment, and addressing any remaining issues.

These phases are common in the DA life cycles, reflecting the disciplined approach to managing complexity in various types of projects, from straightforward to highly complex, while supporting adaptability and continuous improvement.