A method of modifying a requisition within approval and budgetary constraints by a procurement organization may include receiving the requisition from a requesting organization, where the requisition may comprise one or more lines, each having been approved by the requesting organization. The method may also include receiving a change to be applied to a first line associated with a first budget allocation, where the change may be received from a buyer in the procurement organization, and the change may be associated with a second budget allocation. The method may additionally include determining that the change violates a threshold, sending the change to the requesting organization for a second approval, receiving, from the requesting organization, an indication as to whether the second approval is granted, and creating a purchase order based on the indication as to whether the second approval is granted.