A type of purchase order used to expedite the acquisition of non-recurring goods and services necessary for operations. These usually have a fixed maximum dollar amount authorized so that costs can be controlled. A field purchase order is occasionally needed to cover certain business expenditures that occur unexpectedly (e.g., the breakdown of a company vehicle in the middle of a delivery trip). These items need to be handled in a timely manner without the delay of higher level approval so that normal business operations can continue.