Henry v. Dow Chemical Co.

*488WEAVER, J.

Class action litigation in Michigan is governed by the Michigan Court Rules, and MCR 3.501(A)(1) specifically sets forth the prerequisites for class certification. These prerequisites are often referred to as numerosity, commonality, typicality, adequacy, and superiority.1

In this case we consider the proper analysis a court must conduct when determining whether the prerequisites for class certification have been met. Additionally, we consider whether this particular class of plaintiffs was erroneously certified by the circuit court.

In deciding these questions, we conclude that a…