Performance Evaluations

The subject of coordinate measuring machine (CMM) evaluation is a broad an multifaceted one. The theme of this chapter is the evaluation of CMM measurement uncertainty which is central to the concept of traceability. This chapter elucidates the sources of uncertainty and discusses methodologies of how CMM performance an be quantified. This naturally leads to a review of various national and international standards regarding CMM performance evaluation. The chapter ends with a discussion of methods that users can consider when estimating CMM measurement uncertainty. This information will aid CMM users and purchasers when evaluating generalized claims made regarding CMM accuracy.