Systems and methods are provided for an online purchasing system. In one embodiment, the online system includes business logic for approving a purchase requisition having a plurality of itemized goods and service and requiring approval by a plurality of authorized approvers on a line item by line item basis. An approval table defining identified authorized approver and conditions under which the authorized approvers must approve specified line items in a particular purchase request is generated by the online purchasing system to enable approvers of the purchase requisition to monitor the status of the particular purchase request. In a second embodiment, the online purchasing system through extracting business logic identified a second group of authorized approver and conditions under which the authorized approvers must approve specified line items.