One of the advantages of unit deman

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. For example, doubling the production of a department does not necessarily mean that twice as many employees will be needed. The unit manager is in the best position to know how many new positions will be needed to achieve the additional level of output.One of the major disadvantages of unit-demand forecasting is that collecting the necessary data requires the cooperation of a large number of people, and some people simply do not cooperate. Furthermore, the in formation sometimes cannot be aggregated meaningfully since each unit manager may have used slightly different assumptions.Expert Opinion: Long-term employment needs can be forecast from the subjective estimates of experts. Expert opinions may come from a group or from a single individual, such as the human resource director or a long-range planning specialist considered to be the least sophisticated approach to employment planning. Experts typically base their judgments on their own intuition or past experience, the opinions of others, or the economic and social conditions they observe.