Patent ID: 7225104

Claim:
A computer-based method of estimating uncertainty of measuring machines, comprising: estimating in a computer information of errors or precisions on a measuring machine to be estimated; deriving a covariance matrix or correlation matrix of measured values provided from the measuring machine based on the information estimated in the previous step; deriving eigenvalues and eigenvectors from eigenvalue decomposition of the covariance matrix or correlation matrix derived in the previous step; generating pseudo-measured values of the measuring machine by generating a normal random number as a coefficient of coupling for each eigenvector derived in the previous step and linearly coupling all eigenvectors, the normal random number having an expected value of 0 and a variance equal to an eigenvalue corresponding to the eigenvector; estimating uncertainty of the measuring machine through statistical processing of the pseudo-measured values obtained in the previous step; and communicating the estimated uncertainty of the measuring machine obtained in the previous step to a user of the computer.