Certainty is like a rainbow: wonderful but relatively rare. More often than not, we know that we don’t know. We may seek to remedy this by talking to people who may know what we want to know. But how do we know that they know? If we cannot ascertain whether they actually do know, we must trust them.Historically, we have bestowed our trust on the basis of science, experience, or divine inspiration.

Infrastructure projects are the catalyst that drives economic growth. Physical infrastructure such as roads, ports, rail, highways, airports, power and water supply are needed for the transportation of goods, people mobility, ensuring the production of manufacturers and so many other daily activities.Infrastructure, just like other types of capital expenditure, will become obsolete after years of continuous usage and exposure to various usage and environmental factors.