Mediation is the most formal and least used method of conflict resolution.

Mediation

Conflict resolution procedure in which a mediator hears the views of both sides and facilitates the negotiation process but has no formal authority to dictate a resolution.

Conflict Resolution

Conflict resolution involves the process of resolving a dispute or disagreement between parties by addressing the root causes and finding an amicable solution that satisfies all parties involved.

Formal

Pertains to actions, procedures, or appearances that are done in accordance with established or prescribed rules.