Alternative Dispute Resolution (ADR) is the procedure for settling disputes without litigation, such as arbitration, mediation, or negotiation. ADR procedures are usually less costly and more expeditious. Moreover, the  term alternative dispute resolution (ADR) means any procedure, agreed to by the parties of a dispute, in which they use the services of a neutral party to assist them in reaching agreement and avoiding litigation.
The most common types of ADR are mediation, conciliation, arbitration and adjudication.