Uncertainties and optimized sampling in surface roughness characterization

▶ Engineering surfaces can exhibit significant global- and local parameter variations. ▶ Uncertainties in sampling can be un-expectantly large due to variations in topography. ▶ Optimised sampling strategies both locally and globally decrease uncertainty. ▶ Optimised sampling shows a potential to halve the number of measurements needed. ▶ More sophisticated rules than presented here need to be developed for “stop-sampling” criteria.