What management rights can be addressed in a labor agreement?

"When a company becomes unionized, management loses some of its decision-making abilities. But management still has certain rights that can be negotiated in collective bargaining. One way to resist union involvement in management matters is to put a management rights clause in the labor agreement. Most union contracts have one. A typical clause gives the employer all rights to manage the business except as specified in the contract. For instance, if the contract does not specify the criteria for promotions, with a management rights clause, managers will have the right to use any criteria they wish. Another way to preserve management rights is to list areas that are not subject to collective bargaining. This list might secure management’s right to schedule work hours; hire and fire workers; set production standards; determine the number of supervisors in each department."