Issue tree

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Issue tree

An issue tree, also called "logic tree" or "issue map," is a graphical breakdown of a question that dissects it into its different components vertically and that progresses into details as it reads to the right.[1]

Issue trees are useful in problem solving to identify the root causes of a problem as well as to identify its potential solutions. They also provide a reference point to see how each piece fits into the whole picture of a problem.[2]

There are two types of issue trees: diagnostic ones and solution ones.

Diagnostic trees breakdown a "why" key question, identifying all the possible root causes for the problem. Solution tree breakdown a "how" key question, identifying all the possible alternatives to fix the problem.