Who are responsible for the employment forecast when using the unit demand forecasting method, the major people in the organization?

Supervisors

The unit demand method requires managers to know what business activity will be performed by their units in future years and how many people will be needed year by year to achieve their business objectives. One of the advantages of unit demand forecasting is that unit managers typically have very accurate information regarding how many people are required for different production levels. From the 2013 HRCP Program Unit 2, page 55