A system, comprising: (a) a dispensing apparatus for preparing a blended resin for additive manufacturing, said apparatus comprising: (i) a dispensing port configured to dispense resin to a build region of an additive manufacturing apparatus; (ii) a mixer in fluid communication with said dispensing port; (iii) at least two or three resin feed units (54, 56, 58, 60, 62, 64) operatively associated with said mixer, each of said resin feed units configured for operative association with a separate resin supply container (14, 16, 18, 20, 22, 24); (iv) a controller operatively associated with each of said resin feed units, said controller configured to dispense resin from at least two or three resin feed units through said mixer and dispensing port in a desired ratio; (v) at least one first unique identifier reader operatively associated with said controller and configured to read a unique identifier associated with the separate resin supply containers; and (vi) optionally but preferably, a second unique identifier reader operatively associated with said controller and configured to read a unique identifier associated with an additive manufacturing apparatus, or a build region of an additive manufacturing apparatus; (b) a plurality of additive manufacturing machines operatively associated with said controller of said dispensing apparatus; and (c) a database operatively associated with each of said plurality of additive manufacturing machines, said database configured to record part configuration data, resin data, and blended resin data for each part produced on each additive manufacturing machine. (a) a dispensing apparatus for preparing a blended resin for additive manufacturing, said apparatus comprising: (i) a dispensing port configured to dispense resin to a build region of an additive manufacturing apparatus; (ii) a mixer in fluid communication with said dispensing port; (iii) at least two or three resin feed units (54, 56, 58, 60, 62, 64) operatively associated with said mixer, each of said resin feed units configured for operative association with a separate resin supply container (14, 16, 18, 20, 22, 24); (iv) a controller operatively associated with each of said resin feed units, said controller configured to dispense resin from at least two or three resin feed units through said mixer and dispensing port in a desired ratio; (v) at least one first unique identifier reader operatively associated with said controller and configured to read a unique identifier associated with the separate resin supply containers; and (vi) optionally but preferably, a second unique identifier reader operatively associated with said controller and configured to read a unique identifier associated with an additive manufacturing apparatus, or a build region of an additive manufacturing apparatus; (i) a dispensing port configured to dispense resin to a build region of an additive manufacturing apparatus; (ii) a mixer in fluid communication with said dispensing port; (iii) at least two or three resin feed units (54, 56, 58, 60, 62, 64) operatively associated with said mixer, each of said resin feed units configured for operative association with a separate resin supply container (14, 16, 18, 20, 22, 24); (iv) a controller operatively associated with each of said resin feed units, said controller configured to dispense resin from at least two or three resin feed units through said mixer and dispensing port in a desired ratio; (v) at least one first unique identifier reader operatively associated with said controller and configured to read a unique identifier associated with the separate resin supply containers; and (vi) optionally but preferably, a second unique identifier reader operatively associated with said controller and configured to read a unique identifier associated with an additive manufacturing apparatus, or a build region of an additive manufacturing apparatus; (b) a plurality of additive manufacturing machines operatively associated with said controller of said dispensing apparatus; and (c) a database operatively associated with each of said plurality of additive manufacturing machines, said database configured to record part configuration data, resin data, and blended resin data for each part produced on each additive manufacturing machine.