For a three-year project, my strategy would involve a comprehensive planning stage. This entails defining the project's objectives, outlining the scope, estimating necessary resources, and recognizing possible risks. During the execution phase, my plan would focus on continuous collaboration with team members, holding regular status update meetings, conducting performance reviews, and maintaining awareness of the project's long-term vision and goals. We would also need to be ready for unexpected developments and remain flexible to adjust as needed. In contrast, for a three-week project, the emphasis would be on efficient execution management. The planning phase would be brief, quickly transitioning to implementation. I would likely adopt an agile development approach, incorporating daily scrums to ensure alignment among team members and to swiftly address any challenges that arise. Daily check-ins would be conducted with the aim of removing obstacles and facilitating rapid delivery.