Cal. CCP § 404.1

Coordination of civil actions sharing a common question of fact or law is appropriate if one judge hearing all of the actions for all purposes in a selected site or sites will promote the ends of justice taking into account whether the common question of fact or law is predominating and significant to the litigation; the convenience of parties, witnesses, and counsel; the relative development of the actions and the work product of counsel; the efficient utilization of judicial facilities and manpower; the calendar of the courts; the disadvantages of duplicative and inconsistent rulings, orders, or judgments; and, the likelihood of settlement of the actions without further litigation should coordination be denied.