Multiple undefined tasks would favor using the agile methodology to manage an upcoming project. Agile methodology is a project management framework that breaks projects down into several dynamic phases, commonly known as sprints. Agile methodology is an iterative and adaptive approach that allows teams to respond to changing requirements and customer feedback quickly and effectively. Agile methodology is suitable for projects that have multiple undefined tasks, as it enables teams to prioritize and deliver the most valuable features first, and refine and improve them over time based on user input and testing12

A RACI chart would be the most useful option for the project manager to illustrate roles for major project activities for an upcoming project kickoff. A RACI chart is a visual representation of a RACI matrix that shows who is responsible, accountable, consulted, and informed for each task or activity in a project using a table format. A RACI chart can help to communicate and document the roles and expectations of each team member and stakeholder for the project and ensure alignment and agreement.