Task 7: Writing action rules

You add several action rules to a decision table, and define the rules with the Business Action Language (BAL).

1. Create the MinimumNetIncome rule:
   1. In the rule project, right-click the eligibility package and then click New > Action Rule.
   2. In the Name field, type MinimumNetIncome.
   3. Click Finish.

      The Rule Explorer view displays the new action rule and the Intellirule editor opens.

2. Write the MinimumNetIncome rule as follows:

   if
      the income after tax of 'the borrower' is less than 24000 
   then
      add "The yearly income is lower than the basic request" 
      to the messages of 'the loan' ;
      reject 'the loan' ;

3. In the validation package, add the following rules:

   Name	Rule
   MaximumAgeReq	if the age of 'the borrower' is more than 65 then add "The age exceeds the maximum." to the messages of 'the loan' ; reject 'the loan' ;
   MaximumAmount	if the amount of 'the loan' is more than 1000000 then add "The loan cannot exceed 1000000" to the messages of 'the loan' ; reject 'the loan';

4. Right-click the eligibility package and then click New > Decision Table.
5. In the dialog, type the name RepaymentAndScore and then click Finish.
   The decision table opens in the default editor. The table shows three empty condition columns, and one empty action column.
6. Define the first condition column:
   1. Right-click the header of first column, and then enter the title debt to income.
   2. Enter the following condition test in the edit bar:

      the yearly repayment of 'the loan' * 100 / the yearly income of 'the borrower' is at least <min> and less than <max>

   3. Click OK.
7. Define the second condition column:
   1. Right-click the header and enter the title credit score.
   2. Enter the following condition test:

      the credit score of 'the borrower' is at least <min> and less than <max>

   3. Click OK.
8. Delete the third condition column by right-clicking the column header and selecting Delete from the menu.
9. Define the first action column:
   1. Right-click the header of the first action column and enter the title message.
   2. Enter the following action:

      add <a string> to the messages of 'the loan'

   3. Click OK.
10. Create and define a second action column:
    1. Right-click the header of the message column and click Insert column > Action after.
    2. Right-click the header of the new column, and enter the title rejected.
    3. Enter the following action:

       reject 'the loan'

    4. Click OK.
11. Fill rows 1 to 7 with the following data:

    Debt to income		Credit score		Message	Rejected
    0	30	0	200	Debt-to-income too high compared to credit score
    0	30	200	800
    30	45	0	400	Debt-to-income too high compared to credit score
    30	45	400	800
    45	50	0	600	Debt-to-income too high compared to credit score
    45	50	600	800
    		0	800	Debt-to-income ratio is greater than 49

    Tip: You can copy and paste the data in the first cell of the decision table.
12. Fill row 7 debt to income values:
    1. Right-click row 7 underneath the min column, and click Operator.
    2. Click ≥ for more than and equal to.
    3. Type 50, press Enter.
13. Disable actions in selected rows:
    1. Right-click row 2 within the message column, and click Disable. A red disable symbol is displayed.
    2. Do the same for rows 4 and 6 in the message column.
    3. Right-click row 2 within the reject column, and click Disable. A red disable symbol is displayed.
    4. Do the same for rows 4 and 6 in the reject column
14. Format debt to income column:
    1. Right-click the header of the column.
    2. Click Format column.
    3. Enter the following format {0, number, #0.##} .
    4. Click OK to save your changes.
15. Save your work.