Organizational conflict arises when groups compete for limited resources and have differing goals and needs. There are various sources of conflict within organizations, including interdependence of work, scarce resources, performance goals and evaluation. Two main types of conflict that can occur are substantive conflict, which involves disagreements over issues or tasks, and affective conflict, which includes tensions, animosities and personality clashes between individuals or groups. Different models for addressing organizational conflict include the competing values framework, principled negotiation, and third-party problem solving. Leaders should develop strategies for resolving intergroup conflicts such as open communication, interest-based bargaining, and joint decision making.