Key factors include project complexity, team size, stakeholder involvement, flexibility requirements, and organizational culture.

Agile emphasizes iterative development, flexibility, continuous collaboration, and quick adaptation to change, whereas traditional approaches are more linear and plan-driven.

Scrum promotes transparency, frequent feedback, flexibility in adapting to changes, and improved team collaboration and productivity.

Steps include assessing organizational needs, selecting an appropriate methodology, training team members, piloting the approach, and continuously monitoring and refining the process.