[1] Stellenbosch University, Department of Industrial Engineering, Stellenbosch,7600, South Africa
[2] Stellenbosch University, DSI-NRF Ctr. of Excellence in Scientometrics and Science, Technology and Innovation Policy (SciSTIP), Stellenbosch,7600, South Africa
[3] Next Generation Enterprises and Institutions, Csir, Pretoria,0002, South Africa