1. Central Theoretical Council, Communist Party of Vietnam Central Theoretical Council, Hanoi, Vietnam
2. Commonwealth Scientific and industrial Research Organisation (CSIRO), Herston, Queensland, Australia
3. Directorate for Standards, Metrology and Quality (STAMEQ), Hanoi, Vietnam
4. Department of Industrial Engineering and Engineering Management, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.