Optimal CMM measurement locationsfor manufactured part modeling

The focus of this paper is to address the problem of optimalmeasurement location for manufactured part modeling (MPM)with CMM coordinate data. In the manufactured part modeling approach, a shape deviation model parameterized to representthe part's actual geometric attributes is determined from the measured data. The resulting model parameters are then used to makedecisions regarding part acceptability and/or manufacturing process control. The goal of optimal measurement is to ensure theaccurate and robust estimation of model parameters. A sensitivitymeasure that reflects the confidence associated with the estimatedvalues of the parameters and their robustness against singularityis developed as a criterion for choosing measurement point locations.