**Acknowledgements**

All praise is to the Almighty for giving me the ability and capability to write this chapter as part of my little contribution towards knowledge dissemination. My gratitude goes to InTech-Open access for providing the opportunity and inspiration to write this chapter. My product development and management students also deserve special mention here for their support and cooperation towards the compilation of this work. Similarly, the works of all authors and institutions whose documents have been reviewed and utilized in this paper are dully acknowledged. To my wife and children I say thank you for your care and understanding.
