Junkang Guo received the B.S. and M.S. degrees in mechanical engineering from Central South University, Changsha, China, in 2007 and 2010, respectively, and the Ph.D. degree in mechanical engineering from Xi’an Jiaotong University, Xi’an, China, in 2017. His research is centered on the modeling, measurement, and optimal control for geometric error. Modeling: CATolerancing, SSM, FEM, Kinematics, Data Driven... Measurement: Optical M, FSI, Touch/Scanning Probe... Control: Optimization Theory...