An IT risk threat analysis is best used to establish risk scenarios. A risk scenario is a description of a possible event or situation that may affect the achievement of the IT objectives. A riskscenario consists of three elements: a threat, a vulnerability, and an impact. A threat is a potential cause of an unwanted incident. A vulnerability is a weakness or flaw that can be exploited by a threat. An impact is the consequence or effect of the incident on the IT objectives. An IT risk threat analysis is a technique that identifies and evaluates the threats that may pose a risk to the IT assets and processes. An IT risk threat analysis can help to establish risk scenarios by providing the information and context for the threat element of the risk scenario. The other options are not as directly related to an IT risk threat analysis, as they are related to the outcomes, measures, or responsibilities of the IT risk management process, not the inputs or sources of the IT risk scenarios. References = Risk and Information Systems Control Study Manual, Chapter 1: IT Risk Identification, Section 1.3: IT Risk Scenarios, page 23.