The "Computer Prediction" is only good as a bench-marking tool. The computer's forecast is based upon poor assumptions- for example, that you are competing against middle-of-the-road products and that January is the same as December. It has no clue about what your competitors will do, or whether products will enter or leave the segment. If you change your price or change your marketing mix, you can get some idea of the impact upon this year's demand on a percentage basis. The burden for developing a forecast is on your team. To override the Computer Prediction, enter your own estimate in the "Your Sales Forecast" column.
See 10 Forecasting in The Guide and the FAQ under Reports titled How is the Customer Survey Score Calculated?