Table 1.	Forecasting Terms
    |  |  | 
    | Forecast period | The period of a forecast series from start date to end date, for example, quarterly. | 
    | Interval period | The period between creation of new forecasts; their frequency, for example, weekly. | 
    | Product quantity forecasting | Forecasting in which forecasts are aggregated according to specified fields, where each field is assigned a particular hierarchical level. Also known as multidimensional revenue forecasting. | 
    | Roll up | To sum details and synchronize totals with summaries. | 
    | Summary period | A length of time into which revenues are aggregated for each forecast in a series. The default summary period is the month. | 
    | Summary revenue | The sum of revenues in a forecast period. Each summary period has one summary revenue amount. | 
    | Total forecast revenue | The sum of each summary record. Each summary period is a summary record period. |