1. A method of managing an excess material left from a workpiece by using a computer numerical controlled machine with a controller connected to a database, comprising a plurality of steps of: determining whether the excess material fits a predetermined size criterion; discarding the excess material if the excess material does not fit the predetermined size criterion; formulating a characteristics profile of the excess material if the excess material fits the predetermined size criterion; deriving an identity encompassing the characteristics profile of the excess material; and storing the identity in the database.