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A problem tree is used to:
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Provide a guiding rationale for systems design and evaluation,
- Indicate how one or more problems are the causes of a higher level problem (i.e. the effect),
- Shows how problems are actually interrelated,
- Highlights problems that need to be tackled consecutively to resolve the main constraint,
- Provides an objective basis for monitoring and evaluating changes at a later stage,
- Helps to assess the level of effort and later on impact a project will have to achieve to overcome the problems.
The materials needed are a surface on which to draw (newsprint, paper, chalkboard or the ground) and markers, pens or chalk.
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