What are the main sources of conflict on projects?

According to PMI, the most common sources of conflict on projects are schedules, priorities, resources, technical approaches, administrative procedures, cost, and personality clashes. Schedule conflicts arise from competing deadlines. Priority conflicts occur when stakeholders disagree on what is most important. Resource conflicts happen when multiple projects or activities compete for the same people or equipment. The PMP exam emphasizes that most project conflicts stem from schedules, project priorities, and resources rather than personality clashes, which is a common misconception.