What elements in the relationship between the union and management may hinder or impact the grievance procedure?

The grievance procedure is the formal method identified in contract agreements to correct situations that the union feels are not in concert with the negotiated agreement. Why do you think it is so difficult for union and management to resolve grievances when there is a written document (the negotiated agreement) that may be used as the “rule book”? What elements clutter the grievance procedure?Why is it difficult for union and management to resolve grievances when there is a written document (the negotiated agreement) that should be used as the “rule book”?What elements in the relationship between the union and management may hinder or impact the grievance procedure?