The first Industrial Revolution was achieved by introducing steam, the second by introducing electricity and the third, through computers.
The fourth, said Dr Gunther Kegel, CEO of German manufacturing firm Pepperl+Fuchs, involves connectivity and digitalisation. Industry 4.0 is a German-coined term to represent this latest industrial revolution.
The Industrial Internet of Things (IIoT), on the other hand, is a technological advancement providing this connectivity and digitalisation driving Industry 4.0.
Speaking at the Manufacturing Technology Asia 2017 event held in Singapore earlier this year, Dr Kegel also clarified that the IIoT is not about devices going digital.
"That's nonsense, because most of our devices have been digital for 30 years or more. The difference now is that they are connected and that's what makes it the age of the IIoT," he said.