The workforce is the labour pool in employment. It is generally used to describe those working for a single company. The term may or may not exclude the management, but usually implies those involved in manual labour.
The workforce may be unionised, whereby the union conducts negotiations regarding pay and conditions of employment. In the event of industrial unrest, unions provide a co-ordinating role in organising ballots of the workforce, and strike action.
See also Collective Bargaining and United States labor law