The tribunal process is a screening mechanism adopted by Massachusetts and several other states with the aim of reducing and/or eliminating frivolous lawsuits alleging medical malpractice. A tribunal finding in favor of the defendant(s) does not necessarily end the case. In this state, plaintiffs (or their attorneys) can post a $6,000 bond (the amount can be lowered by the court) in order to proceed with the lawsuit.
The tribunal comprises a health care provider of the same type as the defendant, a lawyer, and a judge. The purpose of the tribunal is not to decide fault or weigh the credibility of evidence, but only to determine whether the plaintiff has presented sufficient evidence to raise at least one issue for further review by the court system. The plaintiff's evidence at the tribunal is called the "offer of proof," and ordinarily contains a letter from a medical expert offering an opinion favorable to the plaintiff's claim.
Although Massachusetts does not allow the defense to present evidence, it does not preclude arguments which highlight or expose weaknesses in the plaintiff's case. Usually the tribunal is held fairly early in the "life cycle" of a lawsuit. Because the results are not binding, the value of tribunals in Massachusetts is, primarily, limited to discouraging only claims so frivolous that no expert testimony is available.