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With multiple inputs or value categories decision table can get very large in size. Decision tables that are to large in size are not easy to oversee and by that to understand. In general you can state that a table should have a maximum of 12 columns. When the number of columns exceeds this number it is advised to split up the table. 

Order in a decision table

When designing a decision table, it is often worth considering in which order the different rows should be declared.

Decision table or data rule?

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Attributes and (reusable) expressions

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Decisions in a process?

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