Solving A Brick Factory with HiGHS: A Time-Indexed MILP
August 19, 2026 · Adam DeJans
A compact time-indexed mixed-integer linear programming solution to the July 2026 Brick Factory challenge, solved and verified with HiGHS.
Articles
Writing on Decision Management — the science, the philosophy, and more. Long-form essays and archived challenge solution documents from practitioners in the community.
231 articles
Optimize the Policy, Not the Forecast
August 16, 2026 · Adam DeJans Jr.
When a business outcome is generated by a policy operating under uncertainty, the most useful optimization target is often downstream economic performance rather than upstream forecast accuracy. Simulation makes it practical to tune the policy directly.
What Is a Policy? Just Ask Anyone Buying a Car.
July 1, 2026 · John Brandon Elam
A policy is the rule you built beforehand that tells you what to do when the pressure shows up. The car lot is a better definition than a sentence.
Agentic Medical Services — Aletyx
April 1, 2026 · Alex Porcelli
Aletyx solution by Alex Porcelli (Aletyx) for the Agentic Medical Services challenge.
Agentic Medical Services — DT5GL/SQL/Python
April 1, 2026 · Jack Jansonius
DT5GL/SQL/Python solution by Jack Jansonius for the Agentic Medical Services challenge.
Probabilistic Forecasts Are Modeling Inputs, Not Reporting Artifacts
December 26, 2025 · Adam DeJans Jr.
A probabilistic forecast creates value only when the decision layer can consume the distribution. Collapsing uncertainty to a single number often throws away the asymmetry that drives the economics of the decision.
Inside/Outside Production — OPL/CPLEX
December 1, 2025 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Inside/Outside Production challenge.
Advanced Website Design — JSR-331
November 1, 2025 · Jacob Feldman
JSR-331 solution by Jacob Feldman (OpenRules) for the Advanced Website Design challenge.
Advanced Website Design — OPL/CPLEX
November 1, 2025 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Advanced Website Design challenge.
Advanced Website Design — RuleSolver
November 1, 2025 · Jacob Feldman
RuleSolver solution by Jacob Feldman (OpenRules) for the Advanced Website Design challenge.
Decision with Two Objectives — Copilot
October 1, 2025 · Jacob Feldman
Copilot solution by Jacob Feldman (OpenRules) for the Decision with Two Objectives challenge.
Decision with Two Objectives — JSR-331
October 1, 2025 · Jacob Feldman
JSR-331 solution by Jacob Feldman (OpenRules) for the Decision with Two Objectives challenge.
Decision with Two Objectives — OpenRules
October 1, 2025 · Alex Mirtsyn
OpenRules solution by Alex Mirtsyn (OpenRules) for the Decision with Two Objectives challenge.
Decision with Two Objectives — OPL CPLEX
October 1, 2025 · Alex Fleischer
OPL CPLEX solution by Alex Fleischer (IBM) for the Decision with Two Objectives challenge.
Decision with Two Objectives — Rule Solver
October 1, 2025 · Jacob Feldman
Rule Solver solution by Jacob Feldman (OpenRules) for the Decision with Two Objectives challenge.
Grid Covering — Pen and Paper
August 1, 2025 · Ken Ritley
Pen and Paper solution by Ken Ritley (Bern University of Applied Sciences) for the Grid Covering challenge.
Rules with Regular Expressions — IBM ODM
July 1, 2025 · Andrew Macdonald
IBM ODM solution by Andrew Macdonald (IBM) for the Rules with Regular Expressions challenge.
Rules with Regular Expressions — DT5GL/SQL/Python
July 1, 2025 · Jack Jansonius
DT5GL/SQL/Python solution by Jack Jansonius for the Rules with Regular Expressions challenge.
Rules with Regular Expressions — Progress Corticon
July 1, 2025 · Seth Meldon
Progress Corticon solution by Seth Meldon (Progress) for the Rules with Regular Expressions challenge.
Rules with Regular Expressions — RulesMatix
July 1, 2025 · Baljeet Singh Kandhari
RulesMatix solution by Baljeet Singh Kandhari (RulesMatix) for the Rules with Regular Expressions challenge.
Risky Stocks — OpenRules Decision Manager
May 1, 2025 · Ian Detinich
OpenRules Decision Manager solution by Ian Detinich for the Risky Stocks challenge.
Risky Stocks — watsonx with Mistral
May 1, 2025 · Alex Fleischer
watsonx with Mistral solution by Alex Fleischer (IBM) for the Risky Stocks challenge.
Case Assignments — DT5GL/SQL
April 1, 2025 · Jack Jansonius
DT5GL/SQL solution by Jack Jansonius for the Case Assignments challenge.
Case Assignments — OPL CPLEX
April 1, 2025 · Alex Fleischer
OPL CPLEX solution by Alex Fleischer (IBM) for the Case Assignments challenge.
Mr Bates vs The Post Office — Copilot + JavaSolver
February 1, 2025 · Jacob Feldman
Copilot + JavaSolver solution by Jacob Feldman (OpenRules) for the Mr Bates vs The Post Office challenge.
Mr Bates vs The Post Office — OpenRules RuleSolver
February 1, 2025 · Jacob Feldman
OpenRules RuleSolver solution by Jacob Feldman (OpenRules) for the Mr Bates vs The Post Office challenge.
Mr Bates vs The Post Office — OPL/CPLEX
February 1, 2025 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Mr Bates vs The Post Office challenge.
Christmas Word Search — Copilot
January 1, 2025 · Jacob Feldman
Copilot solution by Jacob Feldman (OpenRules) for the Christmas Word Search challenge.
Christmas Word Search — CPLEX/OPL
January 1, 2025 · Alex Fleischer
CPLEX/OPL solution by Alex Fleischer (IBM) for the Christmas Word Search challenge.
Christmas Word Search — DT5GL/Python
January 1, 2025 · Jack Jansonius
DT5GL/Python solution by Jack Jansonius for the Christmas Word Search challenge.
Christmas Word Search — Llama/watsonx
January 1, 2025 · Alex Fleischer
Llama/watsonx solution by Alex Fleischer (IBM) for the Christmas Word Search challenge.
Pricing Policy — ChatGPT/DMN
December 1, 2024 · Jacob Feldman
ChatGPT/DMN solution by Jacob Feldman (OpenRules) for the Pricing Policy challenge.
Pricing Policy — DT5GL/SQL
December 1, 2024 · Jack Jansonius
DT5GL/SQL solution by Jack Jansonius for the Pricing Policy challenge.
Pricing Policy — ChatGPT/Python
December 1, 2024 · Jack Jansonius
ChatGPT/Python solution by Jack Jansonius for the Pricing Policy challenge.
Pricing Policy — OpenRules
December 1, 2024 · Alex Mirtsyn
OpenRules solution by Alex Mirtsyn (OpenRules) for the Pricing Policy challenge.
Cheryl's Birthday — CPLEX
October 1, 2024 · Alex Fleischer
CPLEX solution by Alex Fleischer (IBM) for the Cheryl's Birthday challenge.
Rental Boats — Copilot
September 1, 2024 · Jacob Feldman
Copilot solution by Jacob Feldman (OpenRules) for the Rental Boats challenge.
Rental Boats — CPLEX/Java
September 1, 2024 · Guillaume Chagneau
CPLEX/Java solution by Guillaume Chagneau for the Rental Boats challenge.
Rental Boats — Excel Solver
September 1, 2024 · Guillaume Chagneau
Excel Solver solution by Guillaume Chagneau for the Rental Boats challenge.
Rental Boats — Llama/CPLEX
September 1, 2024 · Alex Fleischer
Llama/CPLEX solution by Alex Fleischer (IBM) for the Rental Boats challenge.
Rental Boats — OpenRules/RuleSolver
September 1, 2024 · Ian Detinich
OpenRules/RuleSolver solution by Ian Detinich for the Rental Boats challenge.
Rental Boats — OPL/CPLEX
September 1, 2024 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Rental Boats challenge.
Smart Investment — ChatGPT/ZIMPL
July 1, 2024 · Rob Parker
ChatGPT/ZIMPL solution by Rob Parker for the Smart Investment challenge.
Smart Investment — Excel Solver
July 1, 2024 · Ian Detinich
Excel Solver solution by Ian Detinich for the Smart Investment challenge.
Smart Investment — Llama3/CPLEX/watsonx
July 1, 2024 · Alex Fleischer
Llama3/CPLEX/watsonx solution by Alex Fleischer (IBM) for the Smart Investment challenge.
Smart Investment — OpenRules RuleSolver
July 1, 2024 · Ian Detinich
OpenRules RuleSolver solution by Ian Detinich for the Smart Investment challenge.
Smart Investment — OPL/CPLEX
July 1, 2024 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Smart Investment challenge.
Smart Investment — Progress Corticon
July 1, 2024 · Seth Meldon
Progress Corticon solution by Seth Meldon (Progress) for the Smart Investment challenge.
Stable Marriage Problem — OpenRules RuleSolver (no Java)
June 1, 2024 · Jacob Feldman
OpenRules RuleSolver (no Java) solution by Jacob Feldman (OpenRules) for the Stable Marriage Problem challenge.
Stable Marriage Problem — OpenRules RuleSolver (with Java)
June 1, 2024 · Jacob Feldman
OpenRules RuleSolver (with Java) solution by Jacob Feldman (OpenRules) for the Stable Marriage Problem challenge.
Stable Marriage Problem — OPL/CPLEX
June 1, 2024 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Stable Marriage Problem challenge.
Stable Marriage Problem — watsonx
June 1, 2024 · Alex Fleischer
watsonx solution by Alex Fleischer (IBM) for the Stable Marriage Problem challenge.
Lookup Tables in Decision Models — DT5GL
April 1, 2024 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Lookup Tables in Decision Models challenge.
Lookup Tables in Decision Models — OpenRules
April 1, 2024 · Jacob Feldman
OpenRules solution by Jacob Feldman (OpenRules) for the Lookup Tables in Decision Models challenge.
Analyzing Employees — ChatGPT/Python
March 1, 2024 · Jack Jansonius
ChatGPT/Python solution by Jack Jansonius for the Analyzing Employees challenge.
Analyzing Employees — Corticon
March 1, 2024 · Seth Meldon
Corticon solution by Seth Meldon (Progress) for the Analyzing Employees challenge.
Analyzing Employees — OPL
March 1, 2024 · Alex Fleischer
OPL solution by Alex Fleischer (IBM) for the Analyzing Employees challenge.
Analyzing Employees — Python/DT5GL
March 1, 2024 · Jack Jansonius
Python/DT5GL solution by Jack Jansonius for the Analyzing Employees challenge.
Family Riddle — ChatGPT/CPLEX
January 1, 2024 · Alex Fleischer
ChatGPT/CPLEX solution by Alex Fleischer (IBM) for the Family Riddle challenge.
Family Riddle — OPL/CPLEX
January 1, 2024 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Family Riddle challenge.
Family Riddle — MS Copilot
January 1, 2024 · Microsoft Copilot
MS Copilot solution by Microsoft Copilot for the Family Riddle challenge.
Coins — MiniZinc
October 1, 2023 · Florian Sikora
MiniZinc solution by Florian Sikora for the Coins challenge.
Soldier Payment Rules — DT5GL with SQL (revised)
August 1, 2023 · Jack Jansonius
DT5GL with SQL (revised) solution by Jack Jansonius for the Soldier Payment Rules challenge.
Soldier Payment Rules — DT5GL with SQL
August 1, 2023 · Jack Jansonius
DT5GL with SQL solution by Jack Jansonius for the Soldier Payment Rules challenge.
Soldier Payment Rules — OpenRules Decision Manager
August 1, 2023 · Alex Mirtsyn
OpenRules Decision Manager solution by Alex Mirtsyn (OpenRules) for the Soldier Payment Rules challenge.
Rules as Preferences (Miss Manners Advanced) — OptaPlanner
July 1, 2023 · Thierry Guerin
OptaPlanner solution by Thierry Guerin (Groupe Onepoint) for the Rules as Preferences (Miss Manners Advanced) challenge.
Rules as Preferences (Miss Manners Advanced) — IBM OPL
July 1, 2023 · Alex Fleischer
IBM OPL solution by Alex Fleischer (IBM) for the Rules as Preferences (Miss Manners Advanced) challenge.
Miss Manners — CPLEX
June 1, 2023 · Alex Fleischer
CPLEX solution by Alex Fleischer (IBM) for the Miss Manners challenge.
Miss Manners — OpenRules with Java Solver
June 1, 2023 · Jacob Feldman
OpenRules with Java Solver solution by Jacob Feldman (OpenRules) for the Miss Manners challenge.
Grid of Bulbs — Python
May 1, 2023 · Julien Pradier
Python solution by Julien Pradier (IBM) for the Grid of Bulbs challenge.
Grid of Bulbs — OPL/CPLEX
May 1, 2023 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Grid of Bulbs challenge.
Permit Eligibility — ChatGPT and Java
March 1, 2023 · Jacob Feldman
ChatGPT and Java solution by Jacob Feldman (OpenRules) for the Permit Eligibility challenge.
Permit Eligibility — ChatGPT
March 1, 2023 · ChatGPT
ChatGPT solution by ChatGPT for the Permit Eligibility challenge.
Permit Eligibility — DT5GL
March 1, 2023 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Permit Eligibility challenge.
Permit Eligibility — Oracle
March 1, 2023 · Charlotte Bouvy & Martijn Tromm
Oracle solution by Charlotte Bouvy & Martijn Tromm (Rabobank) for the Permit Eligibility challenge.
Permit Eligibility — Scala
March 1, 2023 · Alex Goldin
Scala solution by Alex Goldin (OpenRules) for the Permit Eligibility challenge.
Holiday Gift Assignment — DT5GL
January 1, 2023 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Holiday Gift Assignment challenge.
Holiday Gift Assignment — OPL/CPLEX
January 1, 2023 · Alex Fleischer
OPL/CPLEX solution by Alex Fleischer (IBM) for the Holiday Gift Assignment challenge.
Holiday Gift Assignment — Picat
January 1, 2023 · Hakan Kjellerstrand
Picat solution by Hakan Kjellerstrand for the Holiday Gift Assignment challenge.
Crack Padlock Code — DT5GL
November 1, 2022 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Crack Padlock Code challenge.
Crack Padlock Code — IBM ODM
November 1, 2022 · Andrew Macdonald
IBM ODM solution by Andrew Macdonald for the Crack Padlock Code challenge.
Crack Padlock Code — Python
November 1, 2022 · Evan Semet
Python solution by Evan Semet for the Crack Padlock Code challenge.
Crack Padlock Code — OPL CPLEX
November 1, 2022 · Alex Fleischer
OPL CPLEX solution by Alex Fleischer (IBM) for the Crack Padlock Code challenge.
Evaluate Team Performance — DT5GL V1
July 1, 2022 · Jack Jansonius
DT5GL V1 solution by Jack Jansonius for the Evaluate Team Performance challenge.
Evaluate Team Performance — DT5GL V2 (finds players with the highest overall performance)
July 1, 2022 · Jack Jansonius
DT5GL V2 (finds players with the highest overall performance) solution by Jack Jansonius for the Evaluate Team Performance challenge.
Evaluate Team Performance — DT5GL V3
July 1, 2022 · Jack Jansonius
DT5GL V3 solution by Jack Jansonius for the Evaluate Team Performance challenge.
Evaluate Team Performance — Executable English
July 1, 2022 · Adrian Walker
Executable English solution by Adrian Walker for the Evaluate Team Performance challenge.
Evaluate Team Performance — IBM ODM
July 1, 2022 · Andrew Macdonald
IBM ODM solution by Andrew Macdonald for the Evaluate Team Performance challenge.
Evaluate Team Performance — Progress Corticon
July 1, 2022 · Seth Meldon
Progress Corticon solution by Seth Meldon (Progress Corticon) for the Evaluate Team Performance challenge.
Evaluate Team Performance — Innovator
July 1, 2022 · Kurth Wilfried
Innovator solution by Kurth Wilfried (AXA) for the Evaluate Team Performance challenge.
Medical Claim Processing — DT5GL
May 1, 2022 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Medical Claim Processing challenge.
Medical Claim Processing — Java
May 1, 2022 · Dr. Bob Moore
Java solution by Dr. Bob Moore for the Medical Claim Processing challenge.
Card Approval Decision — Camunda
October 1, 2021 · Vedavyas Etikala
Camunda solution by Vedavyas Etikala for the Card Approval Decision challenge.
Titanic Booking Service — s(CASP)
August 1, 2021 · Gopal Gupta
s(CASP) solution by Gopal Gupta for the Titanic Booking Service challenge.
Titanic Booking Service — Scikit-Learn
August 1, 2021 · Dr. Bob Moore
Scikit-Learn solution by Dr. Bob Moore for the Titanic Booking Service challenge.
Where is Gold? — Common Sense
June 1, 2021 · Eric Manalac
Common Sense solution by Eric Manalac for the Where is Gold? challenge.
Where is Gold? — Decision Tables
June 1, 2021 · Jan Vanthienen
Decision Tables solution by Jan Vanthienen (KU Leuven) for the Where is Gold? challenge.
Where is Gold? — DT5GL
June 1, 2021 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Where is Gold? challenge.
Where is Gold? — GAMS
June 1, 2021 · Alireza Soroudi
GAMS solution by Alireza Soroudi for the Where is Gold? challenge.
Where is Gold? — IBM CPLEX
June 1, 2021 · Alex Fleischer
IBM CPLEX solution by Alex Fleischer (IBM) for the Where is Gold? challenge.
Where is Gold? — IBM ODM
June 1, 2021 · Andrew Macdonald
IBM ODM solution by Andrew Macdonald for the Where is Gold? challenge.
Where is Gold? — JSR331
June 1, 2021 · Jacob Feldman
JSR331 solution by Jacob Feldman (OpenRules) for the Where is Gold? challenge.
Where is Gold? — MiniZinc
June 1, 2021 · James Delonay
MiniZinc solution by James Delonay for the Where is Gold? challenge.
Where is Gold? — Pyomo
June 1, 2021 · Alireza Soroudi
Pyomo solution by Alireza Soroudi for the Where is Gold? challenge.
Where is Gold? — Scala
June 1, 2021 · I. Khlystov
Scala solution by I. Khlystov for the Where is Gold? challenge.
COVID-19 Testing — DT5GL
May 1, 2021 · Jack Jansonius
DT5GL solution by Jack Jansonius for the COVID-19 Testing challenge.
Rate Loan Risk Category — DT5GL
April 1, 2021 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Rate Loan Risk Category challenge.
Benchmark "Medical Services" — Camunda
February 1, 2021 · Rob Parker
Camunda solution by Rob Parker for the Benchmark "Medical Services" challenge.
Benchmark "Medical Services" — Java (custom HashMap engine)
February 1, 2021 · Dr. Bob Moore
Java (custom HashMap engine) solution by Dr. Bob Moore for the Benchmark "Medical Services" challenge.
Benchmark "Medical Services" — Java
February 1, 2021 · Pradeep Venkat
Java solution by Pradeep Venkat for the Benchmark "Medical Services" challenge.
Benchmark "Medical Services" — Corticon
February 1, 2021 · Seth Meldon
Corticon solution by Seth Meldon (Progress Corticon) for the Benchmark "Medical Services" challenge.
Virtual Chess Tournament — Gurobi
December 1, 2020 · Bernhard C. Schrenk
Gurobi solution by Bernhard C. Schrenk for the Virtual Chess Tournament challenge.
Virtual Chess Tournament — MiniZinc
December 1, 2020 · Florian Sikora
MiniZinc solution by Florian Sikora for the Virtual Chess Tournament challenge.
Virtual Chess Tournament — OPL
December 1, 2020 · Alex Fleischer
OPL solution by Alex Fleischer (IBM) for the Virtual Chess Tournament challenge.
Virtual Chess Tournament — Python
December 1, 2020 · Emmanuel Lazard
Python solution by Emmanuel Lazard for the Virtual Chess Tournament challenge.
Calculator with Two Buttons — MiniZinc
November 1, 2020 · James Delonay
MiniZinc solution by James Delonay for the Calculator with Two Buttons challenge.
Calculator with Two Buttons — No tools
November 1, 2020 · Boro Vujosevic
No tools solution by Boro Vujosevic for the Calculator with Two Buttons challenge.
Calculator with Two Buttons — OPL CPLEX
November 1, 2020 · Alex Fleischer
OPL CPLEX solution by Alex Fleischer (IBM) for the Calculator with Two Buttons challenge.
Compressing Decision Tables — Alternative Heuristics
September 1, 2020 · Dr. Bob Moore
Alternative Heuristics solution by Dr. Bob Moore for the Compressing Decision Tables challenge.
Compressing Decision Tables — DT5GL
September 1, 2020 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Compressing Decision Tables challenge.
Pay-As-You-Go Pricing — Excel/Python
May 1, 2020 · Dr. Bob Moore
Excel/Python solution by Dr. Bob Moore for the Pay-As-You-Go Pricing challenge.
Pay-As-You-Go Pricing — DT5GL
May 1, 2020 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Pay-As-You-Go Pricing challenge.
Pay-As-You-Go Pricing — Relational Rule Base
May 1, 2020 · Leonid Nisenboym
Relational Rule Base solution by Leonid Nisenboym for the Pay-As-You-Go Pricing challenge.
Pay-As-You-Go Pricing — Rulesmatix
May 1, 2020 · Baljeet Singh
Rulesmatix solution by Baljeet Singh (Rulesmatix) for the Pay-As-You-Go Pricing challenge.
Doctor Planning — OPL
April 1, 2020 · Alex Fleischer
OPL solution by Alex Fleischer (IBM) for the Doctor Planning challenge.
Doctor Planning — ZIMPL
April 1, 2020 · Rob Parker
ZIMPL solution by Rob Parker for the Doctor Planning challenge.
Paid Sick Leave Requirements — Behavioral Rules
March 1, 2020 · Ronald G. Ross
Behavioral Rules solution by Ronald G. Ross (Business Rule Solutions) for the Paid Sick Leave Requirements challenge.
NIM Rules — IBM OPL
January 1, 2020 · Alex Fleischer
IBM OPL solution by Alex Fleischer (IBM) for the NIM Rules challenge.
NIM Rules — Machine Learning Approach with Python
January 1, 2020 · Dr. Bob Moore
Machine Learning Approach with Python solution by Dr. Bob Moore for the NIM Rules challenge.
Crack the Code — IBM CPLEX
September 1, 2019 · Alex Fleischer
IBM CPLEX solution by Alex Fleischer for the Crack the Code challenge.
Crack the Code — MiniZinc
September 1, 2019 · James Delonay
MiniZinc solution by James Delonay for the Crack the Code challenge.
Crack the Code — Python
September 1, 2019 · Jack Jansonius
Python solution by Jack Jansonius for the Crack the Code challenge.
Map Coloring with Violations — OPL CPLEX
June 1, 2019 · Alex Fleischer
OPL CPLEX solution by Alex Fleischer for the Map Coloring with Violations challenge.
Map Coloring with Violations — SQL
June 1, 2019 · Damir Sudarevic
SQL solution by Damir Sudarevic for the Map Coloring with Violations challenge.
Map Coloring — DMN
May 1, 2019 · Thierry Guerin
DMN solution by Thierry Guerin for the Map Coloring challenge.
Map Coloring — Java
May 1, 2019 · Alex Goldin
Java solution by Alex Goldin for the Map Coloring challenge.
Map Coloring — SQL
May 1, 2019 · Damir Sudarevic
SQL solution by Damir Sudarevic for the Map Coloring challenge.
Recreational Fee — Camunda
April 1, 2019 · Dr. Bob Moore
Camunda solution by Dr. Bob Moore for the Recreational Fee challenge.
Recreational Fee — DMN DRD
April 1, 2019 · Gary Hallmark
DMN DRD solution by Gary Hallmark for the Recreational Fee challenge.
Recreational Fee — DMN DRD
April 1, 2019 · Martin de Villiers
DMN DRD solution by Martin de Villiers for the Recreational Fee challenge.
Recreational Fee — DT5GL
April 1, 2019 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Recreational Fee challenge.
Offering Donated Organs for Transplant — BPMN/Trisotech
March 1, 2019 · Denis Gagné
BPMN/Trisotech solution by Denis Gagné for the Offering Donated Organs for Transplant challenge.
Offering Donated Organs for Transplant — Drools
March 1, 2019 · Dr. Bob Moore
Drools solution by Dr. Bob Moore for the Offering Donated Organs for Transplant challenge.
Offering Donated Organs for Transplant — RuleSpeak/SBVR
March 1, 2019 · Ronald G. Ross
RuleSpeak/SBVR solution by Ronald G. Ross for the Offering Donated Organs for Transplant challenge.
Offering Donated Organs for Transplant — DT5GL
March 1, 2019 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Offering Donated Organs for Transplant challenge.
Identify Unfriendly Robots — Python ML Packages
January 1, 2019 · Bob Moore
Python ML Packages solution by Bob Moore for the Identify Unfriendly Robots challenge.
Identify Unfriendly Robots — No tools
January 1, 2019 · Vlad Silverman
No tools solution by Vlad Silverman for the Identify Unfriendly Robots challenge.
Vacation Days Advanced — Blaze Advisor
November 1, 2018 · Bob Moore
Blaze Advisor solution by Bob Moore for the Vacation Days Advanced challenge.
Vacation Days Advanced — DT5GL
November 1, 2018 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Vacation Days Advanced challenge.
Vacation Days Advanced — OpenRules with JSR331
November 1, 2018 · Jacob Feldman
OpenRules with JSR331 solution by Jacob Feldman for the Vacation Days Advanced challenge.
Balanced Assignment — CP Optimizer
September 1, 2018 · Philippe Laborie
CP Optimizer solution by Philippe Laborie for the Balanced Assignment challenge.
Balanced Assignment — OPL
September 1, 2018 · Alex Fleischer
OPL solution by Alex Fleischer for the Balanced Assignment challenge.
Zoo, Buses, and Kids — SQL
July 1, 2018 · Damir Sudarevic
SQL solution by Damir Sudarevic for the Zoo, Buses, and Kids challenge.
Credit Card Application — Corticon
June 1, 2018 · Mike Parish
Corticon solution by Mike Parish for the Credit Card Application challenge.
Credit Card Application — DMN with Trisotech
June 1, 2018 · Bruce Silver
DMN with Trisotech solution by Bruce Silver for the Credit Card Application challenge.
Credit Card Application — DT5GL
June 1, 2018 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Credit Card Application challenge.
Up-Selling Rules — Corticon
April 1, 2018 · Mike Parish
Corticon solution by Mike Parish for the Up-Selling Rules challenge.
Up-Selling Rules — DT5GL
April 1, 2018 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Up-Selling Rules challenge.
Tax Decision Table — Camunda
February 1, 2018 · Bob Moore
Camunda solution by Bob Moore for the Tax Decision Table challenge.
Tax Decision Table — Corticon
February 1, 2018 · Mike Parish
Corticon solution by Mike Parish for the Tax Decision Table challenge.
Tax Decision Table — DT5GL
February 1, 2018 · Jack Jansonius
DT5GL solution by Jack Jansonius for the Tax Decision Table challenge.
Tax Decision Table — Trisotech/RapidGen
February 1, 2018 · Jan Purchase
Trisotech/RapidGen solution by Jan Purchase for the Tax Decision Table challenge.
Order Promotions — Corticon
January 1, 2018 · Mike Parish
Corticon solution by Mike Parish for the Order Promotions challenge.
Order Promotions — Drools/Java
January 1, 2018 · Bob Moore
Drools/Java solution by Bob Moore for the Order Promotions challenge.
Order Promotions — DMN FEEL
January 1, 2018 · Bruce Silver
DMN FEEL solution by Bruce Silver for the Order Promotions challenge.
Reindeer Ordering — Camunda/Groovy
December 1, 2017 · Robert Parker
Camunda/Groovy solution by Robert Parker for the Reindeer Ordering challenge.
Reindeer Ordering — Corticon Alternative
December 1, 2017 · Mike Parish
Corticon Alternative solution by Mike Parish for the Reindeer Ordering challenge.
Reindeer Ordering — Corticon
December 1, 2017 · Mike Parish
Corticon solution by Mike Parish for the Reindeer Ordering challenge.
Reindeer Ordering — Drools/Java
December 1, 2017 · Bob Moore
Drools/Java solution by Bob Moore for the Reindeer Ordering challenge.
Reindeer Ordering — Python
December 1, 2017 · Bob Moore
Python solution by Bob Moore for the Reindeer Ordering challenge.
Reindeer Ordering — ZIMPL/LPSolve
December 1, 2017 · Robert Parker
ZIMPL/LPSolve solution by Robert Parker for the Reindeer Ordering challenge.
Soldier Payment Rules — Corticon
November 1, 2017 · Michael Parish
Corticon solution by Michael Parish for the Soldier Payment Rules challenge.
Soldier Payment Rules — SQL
November 1, 2017 · Dr. Bob Moore
SQL solution by Dr. Bob Moore for the Soldier Payment Rules challenge.
Classify Department Employees — Corticon
September 1, 2017 · Mike Parish
Corticon solution by Mike Parish for the Classify Department Employees challenge.
Classify Department Employees — DMN with Trisotech/Drools
September 1, 2017 · Bruce Silver
DMN with Trisotech/Drools solution by Bruce Silver for the Classify Department Employees challenge.
Loan Origination (DMN Chapter 11 Example) — Corticon
June 1, 2017 · Mike Parish
Corticon solution by Mike Parish for the Loan Origination (DMN Chapter 11 Example) challenge.
Loan Origination (DMN Chapter 11 Example) — DT5GL
June 1, 2017 · J Jansonius
DT5GL solution by J Jansonius for the Loan Origination (DMN Chapter 11 Example) challenge.
Loan Origination (DMN Chapter 11 Example) — Blueriq
June 1, 2017 · Maarten Schadd
Blueriq solution by Maarten Schadd for the Loan Origination (DMN Chapter 11 Example) challenge.
Loan Origination (DMN Chapter 11 Example) — Sapiens
June 1, 2017 · Gil Ronen
Sapiens solution by Gil Ronen for the Loan Origination (DMN Chapter 11 Example) challenge.
Loan Origination (DMN Chapter 11 Example) — Trisotech
June 1, 2017 · Denis Gagné
Trisotech solution by Denis Gagné for the Loan Origination (DMN Chapter 11 Example) challenge.
Online Dating Services — Corticon
March 1, 2017 · Mike Parish
Corticon solution by Mike Parish for the Online Dating Services challenge.
Online Dating Services — Executable English
March 1, 2017 · Adrian Walker
Executable English solution by Adrian Walker (Reengineering LLC) for the Online Dating Services challenge.
Online Dating Services — InteliOps
March 1, 2017 · Dr. Vijay Bandekar
InteliOps solution by Dr. Vijay Bandekar for the Online Dating Services challenge.
Determine Booking Fraud — Corticon
February 1, 2017 · Mike Parish
Corticon solution by Mike Parish for the Determine Booking Fraud challenge.
Determine Booking Fraud — Oracle DMN
February 1, 2017 · Arun Pareek
Oracle DMN solution by Arun Pareek (Rubicon Red) for the Determine Booking Fraud challenge.
Rebooking Passengers from Cancelled Flights — Corticon
October 1, 2016 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Rebooking Passengers from Cancelled Flights challenge.
Rebooking Passengers from Cancelled Flights — DMN
October 1, 2016 · Bruce Silver
DMN solution by Bruce Silver (Method & Style) for the Rebooking Passengers from Cancelled Flights challenge.
Rebooking Passengers from Cancelled Flights — DT5GL with SQL
October 1, 2016 · Jack Jansonius
DT5GL with SQL solution by Jack Jansonius for the Rebooking Passengers from Cancelled Flights challenge.
Rebooking Passengers from Cancelled Flights — Model-based optimal solution
October 1, 2016 · Jacob Feldman
Model-based optimal solution solution by Jacob Feldman (OpenRules) for the Rebooking Passengers from Cancelled Flights challenge.
Greeting a Customer with Unknown Data — OpenRules
August 1, 2016 · Jacob Feldman
OpenRules solution by Jacob Feldman (OpenRules) for the Greeting a Customer with Unknown Data challenge.
Family Riddle — Progress Corticon
June 1, 2016 · Michael Parish
Progress Corticon solution by Michael Parish (Progress Software) for the Family Riddle challenge.
DMN Interchange Challenge — XSLT/XPath
April 1, 2016 · Bruce Silver
XSLT/XPath solution by Bruce Silver for the DMN Interchange Challenge challenge.
Port Clearance Rules — BiZZdesign
March 1, 2016 · Antonio Plais
BiZZdesign solution by Antonio Plais (CENTUS) for the Port Clearance Rules challenge.
Port Clearance Rules — Corticon
March 1, 2016 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Port Clearance Rules challenge.
Port Clearance Rules — Blueriq
March 1, 2016 · Maarten Schadd
Blueriq solution by Maarten Schadd (Blueriq) for the Port Clearance Rules challenge.
Port Clearance Rules — Trisotech
March 1, 2016 · Denis Gagné
Trisotech solution by Denis Gagné (Trisotech) for the Port Clearance Rules challenge.
Port Clearance Rules — DecisionsFirst
March 1, 2016 · James Taylor
DecisionsFirst solution by James Taylor (Decision Management Solutions) for the Port Clearance Rules challenge.
Decision Table for Vacation Days Calculation — Avola
January 1, 2016 · Jordy Voesten
Avola solution by Jordy Voesten (Avola) for the Decision Table for Vacation Days Calculation challenge.
Decision Table for Vacation Days Calculation — Blueriq
January 1, 2016 · Maarten Schadd
Blueriq solution by Maarten Schadd (Blueriq) for the Decision Table for Vacation Days Calculation challenge.
Decision Table for Vacation Days Calculation — Comparative analysis of all 19 submissions
January 1, 2016 · Prof. Jan Vanthienen
Comparative analysis of all 19 submissions solution by Prof. Jan Vanthienen (KU Leuven) for the Decision Table for Vacation Days Calculation challenge.
Decision Table for Vacation Days Calculation — Corticon
January 1, 2016 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Decision Table for Vacation Days Calculation challenge.
Decision Table for Vacation Days Calculation — DMN
January 1, 2016 · Gary Hallmark
DMN solution by Gary Hallmark (Oracle) for the Decision Table for Vacation Days Calculation challenge.
Decision Table for Vacation Days Calculation — IBM ODM
January 1, 2016 · Emmanuel Bonnet
IBM ODM solution by Emmanuel Bonnet (Softeam Cadextan) for the Decision Table for Vacation Days Calculation challenge.
Decision Table for Vacation Days Calculation — RapidGen
January 1, 2016 · David Durant
RapidGen solution by David Durant (RapidGen) for the Decision Table for Vacation Days Calculation challenge.
Decision Table for Vacation Days Calculation — Trisotech
January 1, 2016 · Mélanie Gauthier
Trisotech solution by Mélanie Gauthier (Trisotech) for the Decision Table for Vacation Days Calculation challenge.
Monkey Business — CPLEX
November 1, 2015 · Alex Fleischer
CPLEX solution by Alex Fleischer for the Monkey Business challenge.
Monkey Business — JSR331
November 1, 2015 · Rick Schreiber
JSR331 solution by Rick Schreiber for the Monkey Business challenge.
Monkey Business — Progress Corticon
November 1, 2015 · Michael Parish
Progress Corticon solution by Michael Parish (Progress Software) for the Monkey Business challenge.
Collections of Cars — Corticon
September 1, 2015 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Collections of Cars challenge.
Collections of Cars — Blueriq
September 1, 2015 · Maarten Schadd
Blueriq solution by Maarten Schadd (Blueriq) for the Collections of Cars challenge.
Collections of Cars — DMN FEEL
September 1, 2015 · Gary Hallmark
DMN FEEL solution by Gary Hallmark (Oracle) for the Collections of Cars challenge.
Collections of Cars — FlexRule
September 1, 2015 · Arash Aghlara
FlexRule solution by Arash Aghlara (FlexRule) for the Collections of Cars challenge.
Collections of Cars — R
September 1, 2015 · Riccardo Hertel
R solution by Riccardo Hertel for the Collections of Cars challenge.
Find Duplicate Product Lines — Corticon
August 1, 2015 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Find Duplicate Product Lines challenge.
Find Duplicate Product Lines — R
August 1, 2015 · Riccardo Hertel
R solution by Riccardo Hertel for the Find Duplicate Product Lines challenge.
Make a Good Burger — CPLEX
June 1, 2015 · Alex Fleischer
CPLEX solution by Alex Fleischer for the Make a Good Burger challenge.
Make a Good Burger — Corticon
June 1, 2015 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Make a Good Burger challenge.
Make a Good Burger — DMN FEEL prototype
June 1, 2015 · Gary Hallmark
DMN FEEL prototype solution by Gary Hallmark (Oracle) for the Make a Good Burger challenge.
Patient Diagnosis Decision — R with naïve Bayes
April 1, 2015 · Riccardo Hertel
R with naïve Bayes solution by Riccardo Hertel for the Patient Diagnosis Decision challenge.
Change-Making Decision — Corticon
February 1, 2015 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Change-Making Decision challenge.
Vehicle Insurance: The UServ Product Derby — 3D Relational Rule Base
December 1, 2014 · Leonid Nisenboym
3D Relational Rule Base solution by Leonid Nisenboym for the Vehicle Insurance: The UServ Product Derby challenge.
Vehicle Insurance: The UServ Product Derby — Blueriq
December 1, 2014 · Maarten Schadd
Blueriq solution by Maarten Schadd (Blueriq) for the Vehicle Insurance: The UServ Product Derby challenge.
Vehicle Insurance: The UServ Product Derby — Corticon
December 1, 2014 · Michael Parish
Corticon solution by Michael Parish (Progress Software) for the Vehicle Insurance: The UServ Product Derby challenge.
Vehicle Insurance: The UServ Product Derby — DecisionsFirst with OpenRules
December 1, 2014 · James Taylor
DecisionsFirst with OpenRules solution by James Taylor (Decision Management Solutions) for the Vehicle Insurance: The UServ Product Derby challenge.
Vehicle Insurance: The UServ Product Derby — OpenL Tablets
December 1, 2014 · Yuliya Bastun
OpenL Tablets solution by Yuliya Bastun (EIS Group) for the Vehicle Insurance: The UServ Product Derby challenge.
Vehicle Insurance: The UServ Product Derby — Sapiens Decision
December 1, 2014 · Gil Segal
Sapiens Decision solution by Gil Segal (Sapiens) for the Vehicle Insurance: The UServ Product Derby challenge.
Who Killed Agatha? — Corticon
November 1, 2014 · Mike Parish
Corticon solution by Mike Parish (Progress Software) for the Who Killed Agatha? challenge.
Who Killed Agatha? — CPLEX
November 1, 2014 · Alex Fleischer
CPLEX solution by Alex Fleischer for the Who Killed Agatha? challenge.
Borrowing PASS/FAIL Decision with Mitigation Criteria — IDIOM
October 1, 2014 · Mark Norton
IDIOM solution by Mark Norton (Idiom Software) for the Borrowing PASS/FAIL Decision with Mitigation Criteria challenge.
Borrowing PASS/FAIL Decision with Mitigation Criteria — OpenL Tablets
October 1, 2014 · Hanna Peravalava
OpenL Tablets solution by Hanna Peravalava (EIS Group) for the Borrowing PASS/FAIL Decision with Mitigation Criteria challenge.
Borrowing PASS/FAIL Decision with Mitigation Criteria — Oracle Policy Automation
October 1, 2014 · Martijn Tromm
Oracle Policy Automation solution by Martijn Tromm (Oracle) for the Borrowing PASS/FAIL Decision with Mitigation Criteria challenge.