Identify a few sources of conflict and specify which phase of the project life cycle the conflict is most likely to occur

Sources of conflict depended on the phase of the project life cycle (Defining, Planning, Executing, and Delivery). Identify a few sources of conflict and specify which phase of the project life cycle the conflict is most likely to occur. Where applicable, provide real-life examples. What effect if any do either of the team development models have on the conflict?