A class-action lawsuit requires that each member of the group has the same potential claim in order for the collective action to be brought to the court. There are a number of reasons why a class-action suit is a suitable vehicle for an action, and it usually involves a claim against a large company or an employer.
One of the primary reasons for choosing to bring a class-action suit is expenses. Undertaking any court action can be very costly, particularly in cases where the company or employer being sued is large and well funded. By bringing a class-action suit, the claimants can share the costs, which are immediately reduced by needing only one set of legal representatives. This also means that there is only the need to assess one set of circumstances as the claims are the same.