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Risk is the lack of certainty about the outcome of making a particular choice. Statistically, the level of downside risk can be calculated as the product of the probability that harm occurs (e.g., that an accident happens) multiplied by the severity of that harm (i.e., the average amount of harm or more conservatively the maximum credible amount of harm).
Economic impact analyses are often used to examine the consequences of economic development projects and efforts, such as real estate development, business openings and closures, and site selection projects. [14] The analyses can also help increase community support for these projects, as well as help obtain grants and tax incentives. [15]
A number of international agencies have also adopted this definition of impact. For example, UNICEF defines impact as "The longer term results of a program – technical, economic, socio-cultural, institutional, environmental or other – whether intended or unintended. The intended impact should correspond to the program goal."
An erosion gully in Australia caused by rabbits, an unintended consequence of their introduction as game animals. In the social sciences, unintended consequences (sometimes unanticipated consequences or unforeseen consequences, more colloquially called knock-on effects) are outcomes of a purposeful action that are not intended or foreseen.
Risk assessment determines possible mishaps, their likelihood and consequences, and the tolerances for such events. [1] [2] The results of this process may be expressed in a quantitative or qualitative fashion. Risk assessment is an inherent part of a broader risk management strategy to help reduce any potential risk-related consequences. [1] [3]
A collateral consequence may simply be one that is beyond the scope of consideration. These are as opposed to direct consequences, which stem from the action in an anticipated manner. For example, picture a person starting a farm. The direct consequences of this farm's development are revenue for the farmer, produce for consumers, etc.
FMECA extends FMEA by including a criticality analysis, which is used to chart the probability of failure modes against the severity of their consequences. The result highlights failure modes with relatively high probability and severity of consequences, allowing remedial effort to be directed where it will produce the greatest value.
When large objects impact terrestrial planets such as the Earth, there can be significant physical and biospheric consequences, as the impacting body is usually traveling at several kilometres a second (a minimum of 11.2 km/s (7.0 mi/s) for an Earth impacting body [2]), though atmospheres mitigate many surface impacts through atmospheric entry.