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==Contextual explanation==
A current reality tree is a statement of an underlying core problem and the symptoms that arise from it. It maps out a sequence of cause and effect from the core problem to the symptoms. Most of the symptoms will arise from the one core problem or a core conflict. Remove the core problem and we may well be able to remove each of the symptoms as well. Operationally we work backwards from the apparent undesirable effects or symptoms to uncover or discover the underlying core cause.
==Example==
[[Image:CurrentRealityTree_Example.png|thumb|right|Current Reality Tree example]]
A CRT begins with a list of problems, known as undesirable effects (UDEs.) These are assumed to be symptoms of a deeper common cause. To take a somewhat frivolous example, a car owner may have the following UDEs:
::1. the engine won't start
::2. the air conditioning isn't working
::3. the car's radio sounds distorted.
The CRT is constructed by:
::A) attempting to link any two UDEs using a chain of cause-and-effect reasoning
::B) elaborating the reasoning to ensure it is sound and plausible
::C) linking each of the remaining UDEs to the existing tree by repeating the previous steps.
This approach tends to converge on one or two common root causes. In the illustrated case, the root cause of the above UDEs is seen as being a faulty handbrake.
==See also==
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