Columns

Each column in a decision table represents a condition or an action.

The columns in a decision table hold the conditions and actions of the rules in the table. The header cell of each column identifies the object of a condition or the target of an action.

	Grade	Loan		Insurance
	Grade	Min	Max	Rate	Required
1	A	<100,000			false
2	A	100,000	300,000	0,001	true

Each numbered row in the table forms a rule. The rule performs the actions in its row when the conditions in the same row are met. For example, the second row in the example states the following rule:

if
   all of the following conditions are true:
      - Grade is A
      - the amount of Loan is between 100,000 and 300,000,
then
   set decision to a new insurance where
      required is true,
      the rate is 0,001;

You can split a condition across columns in a decision table when a rule statement contains more than one value. For example, the following condition requires you to specify values for <min> and <max>:

if
   the age of Customer is between <min> and <max>

The following decision table expresses the condition in the Age column by using subcolumns for <min> and <max>:

Age group	Age
	Min	Max
1	18	25
2	26	40