Methods and apparatuses for forming customized arthroplasty jigs are disclosed. Some of the apparatuses may comprise a plurality of rapid production machines and an automated mechanical system. The automated mechanical system may be configured to transport a first arthroplasty jig blank to a first rapid production machine and a second arthroplasty jig blank to a second rapid production machine. The first rapid production machine may be configured to form a first arthroplasty jig from the first arthroplasty jig blank, and the second rapid production machine may be configured to form a second arthroplasty jig from the second arthroplasty jig blank, the second arthroplasty jig having a different configuration from the first arthroplasty jig.