JAMS is an alternate dispute resolution center. It is staffed by very sophisticated retired judges, and in some cases, very high level attorneys. It has the benefit of being private, and, generally speaking, provides a much faster remedy than the public sector courts.
Both parties need to agree on the referral to JAMS. Generally speaking, if they agree, an appropriate document is signed in the form of a court order, vesting a particular judge or attorney at JAMS with the same powers to make decisions as a court would have.