* linking each of the remaining UDEs to the existing tree by repeating the previous steps.
This approach tends to converge on a single root cause. In the illustrated case, the root cause of the above UDEs is seen as being a faulty handbrake.
==Software==
* [http://code.google.com/p/jthinker jThinker] is a free tool for building TOC thinking processes diagrams including the current reality tree.
* [http://flyinglogic.com/ Flying Logic] is a commercial tool for building TOC thinking processes diagrams including the current reality tree.
* [http://www.southbeachinc.com/ Southbeach] is a notation and commercial tool for building many different kinds of thinking processes, including TOC and the current reality tree.
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