Why is the use of risk management techniques becoming increasingly significant in IS projects?

IS projects:

It is like projects in many other disciplines, are becoming increasingly complicated, with modern technologies, demanding business objectives and multi-party contractual arrangements. When complexity raises, then does risk and the requirement to manage this in a more formal and structured way. In addition to that, for projects undertaken through external suppliers, there has been a slow movement in the direction of fixed-price contracting, that tends to shift the risk through the customer onto the supplier and hence causes the supplier to take risk much more seriously.