This simplified decision-tree provides insight into options associated with an example EPA requirement to install a new monitoring well. It can be used to help make better educated decisions when dealing with complicated environmental problems. Additional branches could be added to more closely model the actual factors involved in the decision. In addition to the layout view of decisions and probabilities of actions, the decision tree analysis can also be used to simplify statistical calculations to determine the probability of certain costs and find the best branch to follow.

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