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Metaphors in Software Engineering
Klaas van den BergSoftware Engineering GroupFarewell Lecture - 01 July 2010
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TRESESE GroupUTwente
TRESESE GroupUTwente
TRESESE GroupUTwenteHow it Started in 1964
Picture 1964
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TRESESE GroupUTwente
TRESESE GroupUTwente
TRESESE GroupUTwenteA Challenging Journey
1964 Campus THT – Electrical Engineering BSc/MSc Material Science Prof. Jonker, Wim Hulscher, Cock Lodder, Jan Fluitman, …
1975 University of Zambia / Tanzania Lecturer EE - NUFFIC1981 HTS - Technical College Enschede Lecturer - from Hardware to Software1986 1986 University of Twente – Informatica/CAP/SETI Functional Programming Prof. Duijvestijn, Hans van Berne, Gerrit van der Hoeven, ...
1995 University of Twente – PhD Software Measurement & Functional Programming Prof. Duijvestijn, Norman Fenton, Pim van den Broek, …
1996 University of Twente – EWI/SE Software Engineering Group Projects: AOSD-NoE, Darwin, QuadREAD TRESE: Mehmet Aksit … and many colleagues and students
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My Themes
Measurement Quantification of Properties
Models Abstractions of Reality
Why Better systems, better solutions Better understanding of the problems
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Paper Electron Microscopy
Electron Diffraction
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Software Engineering
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Software Engineering
Software Engineering How to design, construct and maintain
software systems
Quality Productivity, Usability, Performance, Maintainability .. Quality Models & Measurement
Software Development Processes / Products: to design / the design
A Picture is Worth a thousand Words
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Software Engineering
Some Problems
Change Technology New Requirements
Crosscutting Modularization based on Concerns Other Concern is present in all Modules
Trade-off Conflicting Quality Properties
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Change: Software Evolution
Darwin Project: MRI Scanners - Philips Medical Systems Modeling Software of MRI Scanner Measure and Improve Evolvability of Software
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Change: Software Evolution
Darwin Project: MRI Scanners - Philips Medical Systems Modeling Software of MRI Scanner Measure and Improve Evolvability of Software
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Models & Measurement
Framework (Hughes) Ivan Kurtev PhD Thesis
My PhD Thesis
No Measurements without a GoalNo Models without a Goal
Everything is a Model (Bezivin)
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Topics in Software Engineering Group
Empirical Software Engineering Validation of Measurements Controlled Experiments
Model-Driven Engineering Models / Metamodels / Meta-metamodels (PhD Ivan Kurtev) Modeling Requirements / Traceability (PhD Arda Goknil)
Aspect-Oriented Software Development Problem: Crosscutting (PhD Chema Conejero) Solution: Composition Filters
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Composition Filters
Mehmet Aksit: Camera Filters
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Composition Filters
Lodewijk Bergmans: Shape Sorter
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Metaphors & Analogies Composition Filters – Cameras/Toys Software Architecture – Buildings/Bridges
Water Pump – Heart Electron Orbits – Planetary Orbits Life/Career – Journey Computer – Brains
Desktop, Folders, Recycle Bin, Threads, Patterns, Objects, Messages, Evolution, Life Cycle, Retirement, Garbage Collection, Code Smell, Bugs, ...
(Metaphors in Computer Science - Colburn & Shute)
Metaphors are fundamental to human thoughtMetaphors are Everywhere (Richardson)
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Metaphors Can Be Considered Harmful
Edsger W. Dijkstra, EWD1036-25
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Metaphors
Metaphors are fundamental to human thought
A Metaphor is Worth a thousand Pictures
Linguistics, Cognitive Psychology, Philosophy of ScienceMany competing theories: War on Metaphor’s (a meta-metaphor)
Metaphors are EverywhereEverything is a Model
Metaphors are ModelsExtend Ivan’s Framework
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Metaphors & Models
Source (familiar domain) - Target (unfamiliar domain) Semantic Mappings / Commuting Diagram / Pushout
Open Issue Metaphors in Model-Driven Engineering Models-Measurements-Metaphors
Source
Target
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Metaphors for Software & Software Engineering
DinosaurMehmet Aksit in Study Guide for Master Students in CS
or
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Software & Software Engineering as Mountain Hiking
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Software & Software Engineering as Mountain Hiking
Cockburn Training & Tools Individual – Team Planned – Improvised Challenging – Fun Dangerous ?? ! !
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Software Engineering can be Dangerous
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Software Engineering is Team Work
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My Team
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Trade-Off Analysis
Quality Factors in Software Engineering
Adaptability Maintainability Functionality Usability Performance Security Portability Cost ….
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Trade-Off Analysis
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Trade-Off Analysis
Quality Factors in Mountain Hiking
Weight Volume Comfort Nutrition Navigation Safety Cost …
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Measurement in Mountain Hiking
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Tradeoff-Analysis in Mountain Hiking
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Hartkeks
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Reflection
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Software Engineering: A Challenging Journey
Only the top counts
The journey is the destination
It is not the mountain we conquer but ourselves
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Conclusion
Metaphors are omnipresent in Computer Science
Metaphors are fundamental for human understanding
Metaphors can be considered harmful
Metaphors theories could be beneficial for Model-Driven Engineering
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Future Work
….
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….
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After climbing a great hill, one only finds that there are many more hills to climb
Nelson Mandela
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Acknowledgements
Many, many people …. Research / Teaching Colleagues / Students Courses / Supervision Study Advisor / Educational Committees Workshops / Conferences Projects / Companies Secretaries / Services / BOZ / Helpdesk / HD / Library ….
THANK YOU ALL
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References
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References
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