Many castings are eventually machined to create additional /ea/I/res or tighter tolerances that are beyond the capabilities of the casting process. To accomplish this machining, the castings must be /neared in a fix/ti re. Surface errors on the casting will cause the position and orientation of the casting to be offset from the nominal. This could result in problems, since the cutting roof is often programmed with respect to the fixture.
Available at: http://works.bepress.com/frank_peters/18/