It is possible to transform a given planned purchase requisition order into a firm order via the Firm PR button (in the Planned Purchase Requisitions Maintenance window). Furthermore, one can also proceed to an automatic conversion of planned requisitions into firm requisitions. As it is useless to convert too distantly planned requisitions (due to sales and induced requirements fluctuations), this conversion is realized for a chosen time horizon. The conversion function asks thus for a deadline. The planned purchase requisitions whose order dates are anterior to this date will automatically be converted into firm purchase requisitions.