Some forecasts are accurate We know exactly what time the sun will rise at any given place on earth tomorrow or one day next month or even next year, Forecasting in a business context, however, is much more difficult and therefore prone to error. We do not know precisely how many orders we will receive or how many customers will walk through the door tomorrow, next month, or next year. Such forecasts are nonetheless necessary to help managers make decisions about resourcing the organization for the future.