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1 | Main | Ask yourself the question what the main decision is. If you think of more than one answer, split these decisions if possible. |
2 | Sub decisions | For each identified decision, determine if the decision is preferably built up out of meaningful sub decisions. These sub decisions could be reusable decisions - in fact reusable decisions will most likely be sub decisions - but not every sub decision has to be a reusable decision. Think of a complex calculation where intermediate results are never reused but are created nevertheless, for the sake of understandability. |
3 | Circularity | Avoid circularity. When decision A depends on the outcome of decision B and decision B needs the result of decision A as input, you're in trouble! When designing decisions top-down circular references can easily be avoided. |
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Note that a decision is not bound to be a Boolean. In general, there are three types of decisions: Boolean decision (you are eligible for benefit X), Classification (you will receive category 'medium' for benefit X) or Calculation result (you will receive € 100,- per year for benefit X). |
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