Create Decision Table based Rules

2019-05-15

Beginner

20 min.

Create decision table type business rules to calculate bonus percentage based on eligibility dates and assignment factor of bonus plan custom business object.

You will learn

How to create decision table based business rules

Rule entity is the technical representation of a simple business rule to be applied to a business case. It defines a business logic that, once evaluated against live data, leads to a decision. A rule includes one or more conditions, and outputs that triggered upon satisfaction of the condition or conditions. Rules can be adapted to the increasing complexity of business cases by combining any number of rules to a rule set.Rule can be of different type like decision table rule or text rule.

Rule Expression Language is an expression language which enables to define condition and result values in decision table and text rule.

For more information, you can read the help documentation:

Rule

Rule Expression Language

Step 1: Create decision table

Switch to Rules tab.
Click + to add rule.
In the New Rule popup, enter the following:
- Name: ELIGIBLE_BONUS_PERCENTAGE or any name of your choice
- Type: Decision Table
Click Create.
In the Details tab, enter the following values:
- Label: Bonus Percentage Eligibility Rule or any label of your choice
- Description: Calculate minimum bonus percentage based on custom business object of S/4HANA (which is: bonus plan) or any description of your choice

Done

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Step 2: Configure decision table settings

Switch to Decision Table tab.
Click Settings.
In the Decision Table Settings popup, enter the following values and expressions:
- To add Condition expression, go to the condition expression cell and press Ctrl + SPACE and then choose the value from the context help as given in the table below.
- To add Fixed Operator, select the given operator from the drop down list.
- To add a new row, click + at end of each row.
Condition Expressions Fixed Operator

BONUS_PLAN_TT.VALIDITY_START_DATE >

BONUS_PLAN_TT.VALIDITY_END_DATE <

BONUS_PLAN_TT.LOW_BONUS_ASSIGN_FACTOR IN
In the Result type, click to add the output columns to the decision table.
Click Apply.
Decision table gets created with the selected condition columns and result column.

There will also be one additional empty row added to the decision table.

You can also Save the decision table. Then you need to click Edit to continue editing the decision table.

Condition Expressions	Fixed Operator
`BONUS_PLAN_TT.VALIDITY_START_DATE`	>
`BONUS_PLAN_TT.VALIDITY_END_DATE`	<
`BONUS_PLAN_TT.LOW_BONUS_ASSIGN_FACTOR`	IN

Done

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Step 3: Define conditions and result expressions

In the row, select the cell for each condition and use in-place rule authoring to enter the given values.

To enter the expression do the following:
- Select the cell.
- Press CTRL + SPACE.
- From the options, select Fixed Value > Select date.
- Choose a date from date picker.
- Click OK.

Depending upon the condition or result data type and operator, the options for rule authoring would change. For example, if the fixed operator is IN then you get options like [, ], .., fixed value, and so forth.

Condition Expression	Values
BONUS_PLAN_TT.VALIDITY_START_DATE	‘2019-01-01’
BONUS_PLAN_TT.VALIDITY_END_DATE	‘2019-12-31’
BONUS_PLAN_TT.LOW_BONUS_ASSIGN_FACTOR	[1 .. 10]
PERCENTAGE_VALUE	15

Filled decision table row looks like this:

Select the row and click Copy Row.
Select the row and click Paste Row.
Repeat copy & paste row and enter condition & result expression values so that the decision table look as shown in the screenshot.

Creating 4-5 rows is not mandatory. You can just create one single row. This is to give you an experience with different modelling options with decision table.