1. PETRONAS Research Sdn. Bhd., Off Jalan Ayer Itam, Kawasan Institusi Bangi, Kajang 43000, Malaysia
2. Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia
3. Department of Statistics, Aliko Dangote University of Science and Technology, Wudil 713281, Nigeria
4. Department of Information System, Universitas Islam Indragiri, Tembilahan 29212, Indonesia
5. Faculty of Business Administration, Rosenheim Technical University of Applied Sciences, Hochschulstraße, 83024 Rosenheim, Germany