This page contains links to resources regarding the risk-value lifecycle
practice. The risk-value lifecycle practice supplements the iterative development and two-level project planning practices with the IBM® Rational Unified Process® (RUP®) lifecycle. This lifecycle identifies four phases, each of which attempts to balance value provided against risk mitigation appropriate to the phase.
There are many materials on this subject: the following links are good starting points for you to get a more comprehensive understanding of this topic.