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B Orlando, Nov 6-10, 2017
© 2017 OpenRules, Inc.
Decision Modeling
in Action
with DMN and OpenRules
Presenter: Dr. Jacob Feldman
OpenRules Inc., CTO
www.OpenRules.com
Technology
Theater
DMN - Decision Model and Notation
OMG standard since 2014
Specifies key concepts and
constructs for Operational
Business Decision Modeling
Current release 1.1 supports
DMN XML interchange format
Next Release 1.2 – Q1 2018
17 vendors announced DMN
support
© 2017 OpenRules, Inc. 2
© 2017 OpenRules, Inc. 3
Recent DMN Books
© 2017 OpenRules, Inc. 4
2016 2016 2017
Bruce Silver James Taylor
Jan Purchase
Jacob Feldman
DMN Interchange
© 2017 OpenRules, Inc. 5
Trisotech
DMN Modeling Concepts
© 2017 OpenRules, Inc. 6
Decision
Requirements
Diagrams (DRD)
Decision Logic
(Standardized
Decision Tables)
Integration with
Business Processes
(BPMN)
Decision Modeling Constructs
Core Constructs• Diagrams with Logical Connections
(information requirements)
• Decision Tables
• Basic Expression Language (S-FEEL)
• Conformance Level 2
Advanced Constructs• Boxed Expressions (FEEL functions with
parameters, contexts, if-then-else, for..return
loops, filters, sorting, recursion, …)
• Conformance Level 3
© 2017 OpenRules, Inc. 7
Hands-On Decision Modeling
The best way to understand DMN is to build
and test real Decision Models
Let’s build and execute for a quite popular
business problems known as “Vacation
Days”
See 20 different solutions at
www.DMCommunity.org
© 2017 OpenRules, Inc. 8
Decision Model “Vacation Days”
© 2017 OpenRules, Inc. 9
DRD- Decision Requirement Diagram
© 2017 OpenRules, Inc. 10
Total Vacation Days
© 2017 OpenRules, Inc. 11
Eligible For 2 Extra Days
© 2017 OpenRules, Inc. 12
Eligible For 3 Extra Days
© 2017 OpenRules, Inc. 13
Eligible For 5 Extra Days
© 2017 OpenRules, Inc. 14
Glossary
© 2017 OpenRules, Inc. 15
Test Data
© 2017 OpenRules, Inc. 16
Test Cases with Expected Results
© 2017 OpenRules, Inc. 17
Executing Decision Model
against Test Case A
© 2017 OpenRules, Inc. 18
Execution Report with
Explanations (Test A)
© 2017 OpenRules, Inc. 19
Execution Report with
Explanations (Test C)
© 2017 OpenRules, Inc. 21
Alternative DMN DecisionTable
© 2017 OpenRules, Inc. 22
It may look more compact but:• It’s hard to recognize the plain English logic
• Difficult to change or add more rules
In Decision Modeling Compactness is not always your friend!
My Presentation
“DMN without Programming”
Title – How Business Analysts Build Executable
Decision Models with DMN but without
Programming
Main idea – Keep DMN Simple, Oriented to Business People
When: – Fri Nov 10: 9:00 – 10:00 am
Where:– Room: Timor 1 & 2
© 2017 OpenRules, Inc. 23
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