How 'Specification by Example' and Test-Driven Development …€¦ · How "Specification by...
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How Specification by Example and Test-Driven-Development Help to Avoid Technical Debt Wolfgang Trumler, Frances Paulisch Corporate Technology, Germany Siemens Corporate Technology Restricted © Siemens AG 2016
Transcript of How 'Specification by Example' and Test-Driven Development …€¦ · How "Specification by...
How Specification by Exampleand Test-Driven-DevelopmentHelp to Avoid Technical Debt
Wolfgang Trumler,Frances Paulisch
Corporate Technology,Germany
Siemens Corporate TechnologyRestricted © Siemens AG 2016
Restricted © Siemens AG 2016October 2016Page 2 Corporate Technology
Can we avoid Technical Debt?
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NO!
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Do we want to avoid Technical Debt?
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It depends!
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Quadrants of Technical Debt by Martin Fowler
“We don't have time todiscuss the requirementsin such a detail.”
"What's that featureall about?"
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How technical debt is introduced
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How to address these issues
Specification by Example
Acceptance Tests
Unit Tests
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Specification by Example
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Specification by Example
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Acceptance Testing with Cucumber
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Unit Testing
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Addressing the Quadrants of Technical Debt
Specificationby Example
Acceptance &Unit Tests
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Defect Rate
Defects / 1k Lines of Code
http://www.mayerdan.com/ruby/2012/11/11/bugs-per-line-of-code-ratio
In-house testing (not completed yet)
• All reported: 7.42
• Related to our component: 4.64
In-house Testing Released Product
Industry Average 15 - 50
MicrosoftApplications 10 – 20 0.5
Cleanroomdevelopment 3 0.1
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The Role of the Architect
RefactorDesignUp-frontDesign
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Summary
We applied• Specification by Example• Acceptance and extensive Unit Testingto avoid technical debt in late phases of the project
Used Defect Rate as performance indicator
Methodology mix worked well for us (very low Defect Rate)
Planning to roll-out on broader scale
Thank you!
Wolfgang TrumlerFrances Paulish
Corporate TechnologyGermany
Thank you
