When will the courts turn to the doctrine of abuse of process to determine whether relitigation should proceed?

And again, reading from the headnote of Toronto v. CUPE Local 79: …courts will turn to the doctrine of abuse of process to ascertain whether relitigation would be detrimental to the adjudicative process. The doctrine engages the inherent power of the court to prevent the misuse of its procedure, in a way that would bring the administration of justice into disrepute. It has been applied to preclude relitigation in circumstances where the strict requirements of issue estoppel are not met, but where allowing litigation to proceed would nonetheless violate such principles as judicial economy, consistency, finality, and the integrity of the administration of justice. The motive of the party who seeks to relitigate, and the capacity in which he or she does so, cannot be decisive factors in the application of the bar against relitigation. What is improper is to attempt to impeach a judicial finding by the impermissible route of relitigation in a different forum. A proper focus on the process, rather than on the interests of a party, will reveal why relitigation should not be permitted."