You have just been assigned as the project manager of a 15 year, 200 trillion dollar project to marry the first couple on Mars. In addition to buying a wedding present, you will probably want to describe which type of project organization in your management plan

Industrial relations or employment relations is the multidisciplinary academic field that studies the employment relationship; that is, the complex interrelations between employers and employees, labor/trade unions, employer organizations, and the state. (Source: Wikipedia)

Good examples of industrial relations are: Union organizing, collective bargaining and strikes. These three actions involve active participation of both organized labor and management.