Flowcharts and Gantt charts support different parts of project planning. A flowchart explains how work moves through steps, decisions, owners, and handoffs. A Gantt chart places project tasks on a timeline and shows dates, durations, milestones, progress, and dependencies. Project size or duration does not determine which one to use; the planning question does. Many teams use flowcharts to clarify process logic and Gantt charts to manage the schedule.