Things to Think About Before Carrying out the Forecast
Before you can carry out the forecast for an article, the following prerequisites must be fulfilled:
For a more detailed description of these prerequisites, see Overview
Before carrying out the forecast, you also have the possibility of revising an article's historical values which are normally automatically updated by the system during withdrawal postings. On the one hand, you can achieve this by doing one of the following;
On the other hand, you can reduce the number of periods to be taken into consideration by limiting the number of historical values in the article master. This means that not all of the historical values are used for the forecast, and instead, only the number of values that you enter.
If a structural interruption appears in the time series of past values stored in the article master record, and if for the next forecast you only want the system to take those values into account which lie after the interruption, then you do this by entering the appropriate number of past time periods in the Historical values field.
Consumption values not determined by the SAP System can be maintained directly with the following exception.
Consumption values for the period in which the article was created as well as in the previous period. These periods can only be influenced by consumption postings for the respective period.