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Updated on 25/07/2023

Hit Policy – General Rules

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When more than one rule matches the input data, this is known as overlapping rules, “Hit Policy” specifies what the Decision Table should do as a result. The “Hit Policy” is succinctly stated using the first character of the policy name for clarity.

Hit Policy is selected in this field.

Hit Policies

Multiple (conflicting) rules can match different outputs.
Rules are evaluated from top to bottom.
Rules can conflict, only the first match matters.
The first matching value is output.

Conflict does not create a problem
All matching rules should result in the same output.
All result outputs are the same and a single result is returned.

There is no conflict.
All rules are discrete.
Only one rule can match.

Multiple rules can match, with different output entries.
Priorities are independent from rule sequence.
Returns the matching rule with the highest output priority.

Returns all matches in rule order.
It results in a list of outputs in order.

Returns all of the hits in decreasing output priority order.

Collect operators are;

C+Sum: Sum of all the distinct outputs of all matching rules.
C<Minimum: The smallest value of the outputs of all matching rules.
C>Maksimum: The largest value of the outputs of all matching rules.
C#Count: Returns the number of distinct outputs of all matching rules.

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