Alternative Dispute Resolution (ADR) describes any method of resolving legal disputes other than through litigation in the courts or tribunals. ADR includes arbitration, mediation, adjudication, conciliation, med-arb, and early neutral evaluation/expert determination. This chapter explains the differences between the various forms of ADR, why ADR exists, its many advantages (compared to litigation), and its disadvantages. The chapter examines case law dealing with the ‘cost consequences’ of a failure by one party to a legal dispute to engage in ADR when presented with the opportunity to do so. The chapter considers whether ADR should be made compulsory and the extent to which the parties to a dispute, having agreed to resolve their dispute through ADR, can be compelled to honour that agreement.