**Acknowledgements**

This chapter drew on research funded by the National Research Foundation (NRF) of South Africa (reference number TTK150621119893) as well as by the Tshwane University of Technology (TUT) in South Africa. This funding is gratefully acknowledged.

#### **Conflict of interest**

The author declares no conflict of interest.

## **Thanks**

A word of gratitude is expressed towards Christiaan Schultz whom assisted with the technical editing of the references in this chapter.

*The Future of HR DOI: http://dx.doi.org/10.5772/intechopen.96672*
