Risk transference - Risk transference involves handing ownership of risk to a third party who is typically specialized and better able to address the risk or to withstand its impact.
Risk trigger - An event that causes a risk to occur. A trigger can serve as a warning that a risk has occurred or is about to occur.
Rolling wave planning - A planning approach that focuses on in-depth detailing of work to be accomplished in the near term and progressively lower levels of detail for work scheduled farther in the future. It is based on the idea that work scheduled in the future is more subject to change and thus less worth planning in detail. Rolling wave planning only works for schedules with clearly defined iterations.