ADR stands for Alternative Dispute Resolution. It could be one of a number of different tools used by someone appointed by parties to help them settle their dispute without having to go to court. In addition, alternative dispute resolution methods include negotiations, settlement conferences, and arbitration.
Negotiation is the process of two adversarial parties trying to reach an agreement on a dispute.
If two parties are equally capable of presenting and defending and negotiating a situation, then it is wise for them to attempt direct negotiations. Mediators are usually highly skilled, and highly trained in the process of mediation. The mediator's role is to assist the negotiations by helping to establish the ground rules for the discussions and by promoting clear communication. The mediator will remain neutral and cannot make a decision for the parties. Arbitration is the process by which an experienced legal professional hears a dispute and makes a ruling concerning the dispute.