11 Understand Summary Forecasts

This chapter contains the topic:

• Section 11.1, "About Summary Forecasts."

11.1 About Summary Forecasts

You use summary forecasts to project demand at a product group level. Summary forecasts are also called aggregate forecasts. You can generate a summary of a detail forecast based on detail sales histories or a summary forecast based on summary actual data.

The system updates the Sales History table (F42119) with sales data from the Sales Order table (F4211) to generate summary forecasts. You copy the sales history into the Summary Forecast table (F3400) to generate summary forecasts. The system generates summary forecasts that provide information for each level of the hierarchy that you set up with summary constants. These constants are stored in the Summary Constants table (F4091). Both summary forecasts and summaries of detail forecasts are stored in the Summary Forecast table.

See Also:

• Chapter 8, "Generate Summaries of Detail Forecasts."

11.1.1 Comparing Summaries of Detail and Summary Forecasts

A summary of a detail forecast uses item-level data and predicts future sales in terms of both item quantities and sales amounts.

A summary forecast uses summary data to predict future sales.