Its possible to create demand forecast lines which cover for a period e.g one week or one month. The system will create an inventory forecast for each demandperiod, but the demand is placed on the first day of the period. This gives the result that as soon as the start date of the period is sur passed this requirement is not recognized the by MRP anymore.

The suggestion is that, the a demand forecast requirement for a period is active as long as the start and the end date for the period is still valid for the MRP.

This will much less maintenance of the demand forecast and what should the periode be used for, if not for that