Distinguish between Decision table versus decision tree
Even though both decision tables and decision trees can be used to represent complex program logic, they can be distinguishable on the following three considerations:
Readability: Decision trees are easier to read and understand when the number of conditions are small. On the other hand, a decision table causes the analyst to look at every possible combination of conditions which he might otherwise omit.
Explicit representation of the order of decision making: In contrast to the decision trees, the order of decision making is abstracted out in decision tables.
A situation where decision tree is more useful is when multilevel decision making is required. Decision trees can more intuitively represent multilevel decision making hierarchically, whereas decision tables can only represent a single decision to select the appropriate action for execution.
Representing complex decision logic: Decision trees become very complex to understand when the number of conditions and actions increase. It may even be to draw the tree on a single page. When very large number of decisions are involved, the decision table representation may be preferred.
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