[1] Univ Johannesburg, Post Grad Sch Engn Management, Fac Engn & Built Environm, Johannesburg, South Africa
[2] Univ Otago, Dunedin, New Zealand
[3] Univ Plymouth, Plymouth Business Sch, Plymouth, Devon, England
[4] State Inst Engn & Technol, Dept Mech Engn, Nilokheri 132117, Haryana, India