Michael Anstis Decision Tables & Guvnor

Types

Validation & Verification

Transformation

What is Guvnor?

Decision Tables in Guvnor

Roadmap

Summary

Q&A

Validation & Verification

Transformation

What is Guvnor?

Decision Tables in Guvnor

Roadmap

Summary

Q&A

Agenda Some decisions are simple

Introduction - Some decisions are simple Should I fly to Buenos Aires?

Introduction - Some decisions are simple I want to treat myself

Introduction - Some decisions are simple

Agenda Some decisions are complex

Introduction - Some decisions are complex What insurance premium should I charge?

Applicant's experience

Sailing qualifications

Value of vessel

Type of cover

If less than 35 add 10% surcharge

If less than 45 add 5% surcharge

Transformation

What is Guvnor?

Decision Tables in Guvnor

Roadmap

Summary

Q&A

Horizontal

Vertical

Limited entry

Multi-hit, all hits

Multi-hit, first hit

Single hit

Reduces the number of condition columns.

If the same actions exist for rules covering all condition states for a given condition they can be combined and the condition state becomes irrelevant.

Condition columns are not mutually exclusive

If the Condition columns are not exclusive, some combination of conditions are present in more than one column, which may lead to ambiguity or inconsistency.

Condition columns are not mutually exclusive.

If the Condition columns are not exclusive, some combination of conditions are present in more than one column, which may lead to ambiguity or inconsistency.

Condition columns are mutually exclusive

As the Condition columns are exclusive; combinations of conditions cannot be present in more than one column which eliminates ambiguity and inconsistency.

Classic form if Single-hit is "expanded decision table"; but this can be optimised or “contracted”.

What is Guvnor?

Decision Tables in Guvnor

Roadmap

Summary

Q&A

Ambivalence (conflicting)

Deficiency

Mitigation

Types

Decision Tables in Guvnor

Roadmap

Summary

Q&A

Rules 1, 2 and 3, 4 have the same action no matter what the state of “Hungry”. Therefore they can be contracted...

Types

Validation & Verification

Roadmap

Summary

Q&A

Types

Validation & Verification

Transformation

Summary

Q&A

Multi-hit, all hits

Extended entry

Discretized condition states (enumerated fields)

Condition and rule negation

Cell merging

Cell grouping

Each row compiles into a separate DRL rule

Each row compiles into a separate DRL rule

rule "Row 1 dtable"

dialect "mvel"

when

$person : Person( age < &quot;18&quot; )

then

$person.setHolidayEntitlement( 27 );

end

rule &quot;Row 2 dtable&quot;

dialect &quot;mvel&quot;

when

$person : Person( age >= &quot;18&quot; , age < &quot;45&quot; , lengthOfService < &quot;15&quot; )

then

$person.setHolidayEntitlement( 22 );

end

Types

Validation & Verification

Transformation

What is Guvnor?

Q&A

Improved support for digitised condition states

Usability enhancements

Types

Validation & Verification

Transformation

What is Guvnor?

Decision Tables in Guvnor

Provide a simple, yet powerful, visualisation of decision components

Allow large sets of related rules to be easily worked upon simultaneously

A solid foundation for the future

A roadmap to become the market leader

Types

Validation & Verification

Transformation

What is Guvnor?

Decision Tables in Guvnor

Roadmap

Michael Anstis Decision Tables & Guvnor