Sales forecasting is the process of using a company's past sales records to predict future sales performance. It is an important part of financial planning, though it carries risks and uncertainties. Forecast teams should mention these uncertainties. Accurate sales forecasting requires considering input from various departments within an organization, as well as external factors outside a company's control, such as competition. Relying only on arbitrary numbers without ground-level input can lead to widely incorrect predictions and wasted resources.