A collective bargaining agreement (CBA) is a labor contract between an employer and one or more unions, reached through a process of negotiation between representatives of a union and employers. The CBA typically establishes terms regarding wage scales, working hours, training, health and safety, overtime, grievance mechanisms, and rights to participate in workplace or company affairs. The CBA is the result of an extensive negotiation process between the parties regarding topics such as wages, hours, and terms and conditions of employment. The goal of collective bargaining is to come up with a collective bargaining agreement or contract, which is meant to establish rules of employment for a set number of years. The collective bargaining process may involve antagonistic labor strikes or employee lockouts if the two sides have trouble reaching an agreement. Once a CBA is in place, neither party may deviate from its terms without the other party’s consent, absent extraordinary circumstances.