What is the test for class certification in a class action?

intrusion upon what is otherwise a private consensual agreement negotiated between the parties to a lawsuit must be limited to the extent necessary to reach a reasoned judgment that the agreement is not the product of fraud or overreaching by, or collusion between, the negotiating parties, and that the settlement, taken as a whole, is fair, reasonable and adequate to all concerned." Officers for Justice v. Civil Serv. Comm'n, 688 F.2d 615, 625 (9th Cir. 1982).

1. The Strength of the Case and Risk, Expense, Complexity and Duration of Further Litigation and Maintaining Class Certification