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Dev conf 2017 - What is software product design
- 1. @jacdevos jacques@nreality.com We are all product designers! @jacdevos jacques@nreality.com
- 2. @jacdevos jacques@nreality.com Who here builds software?
- 3. @jacdevos jacques@nreality.com Software is still a new thing
- 7. @jacdevos jacques@nreality.com Empathise: go out and learn about user needs
- 8. @jacdevos jacques@nreality.com Define: frame the problem from user insights
- 9. @jacdevos jacques@nreality.com Ideate: use all brains to get solutions
- 10. @jacdevos jacques@nreality.com Prototype: create a representation we can show (or taste!)
- 11. @jacdevos jacques@nreality.com Test: test assumptions through user feedback
- 13. @jacdevos jacques@nreality.com Not a state, but a process Not magic, but hard work Learning about real user needs Iterate and experiment… until its tasty Design makes things “tasty”
- 14. @jacdevos jacques@nreality.com What does this have to do with software products?
- 15. @jacdevos jacques@nreality.com Software product development is often a pretty Wicked Problem
- 16. @jacdevos jacques@nreality.com Big Bangs just don’t work on Wicked Problems ALICE NERR/THINKSTOCK
- 17. @jacdevos jacques@nreality.com We need feedback to build better products
- 18. @jacdevos jacques@nreality.com Build software iteratively
- 19. @jacdevos jacques@nreality.com Build -> Code Measure -> Data Learn -> Ideas Lean Startup Minimise the total time through the loop
- 20. @jacdevos jacques@nreality.com But why should I care? I’m a programmer. I’m not a startup with $100M!
- 21. @jacdevos jacques@nreality.com Historical SDLC (vs mature engineering discipline) Planning Requirements Design Programming Testing Deployment Engineering Design Construction of Design
- 22. @jacdevos jacques@nreality.com What Is Software Design? Jack W. Reeves (1992)
- 23. @jacdevos jacques@nreality.com Real software is ones and zeros its incredibly cheap to build but incredibly expensive to design
- 24. @jacdevos jacques@nreality.com Code is the ultimate design artefact
- 25. @jacdevos jacques@nreality.com Code shows us • real complexity, cost and constraints • flaws in our problem-solution fit • the devil in the details
- 26. @jacdevos jacques@nreality.com Coding and testing is part of the design process
- 27. @jacdevos jacques@nreality.com Modern SDLC (vs mature engineering discipline) Planning Requirements Design Programming Testing Deployment Engineering Design Construction of Design
- 28. @jacdevos jacques@nreality.com #SoftwareConstructionMustFall development as construction metaphor is broken
- 29. @jacdevos jacques@nreality.com How would we dev if we see it as design process?
- 30. @jacdevos jacques@nreality.com Start with the design problem and not technologies
- 31. @jacdevos jacques@nreality.com Small Releases to enable iteration
- 32. @jacdevos jacques@nreality.com Design Improvement (Refactoring) and System Metaphor (DDD) ensure code structure reflects product learning
- 33. @jacdevos jacques@nreality.com Pair Programming is a design collaboration that creates code that communicates intent
- 34. @jacdevos jacques@nreality.com Simple Design and TDD make changes safer, easier
- 35. @jacdevos jacques@nreality.com Continuous Integration gives early verification and allows change
- 36. @jacdevos jacques@nreality.com DevOps automates construction - by enabling iteration, it enables design
- 37. @jacdevos jacques@nreality.com Testing gives quick design feedback - validation is a key aspect of design
- 39. @jacdevos jacques@nreality.com XP practices are product design enablers!
- 40. @jacdevos jacques@nreality.com Don’t build software, design it! • Design is a iterative process to create Tasty Products • Software product development is a Wicked Problem • Design is a better model than Construction • Code is our ultimate software design artifact • XP, Testing and Continuous Delivery are design tools • Software Developers are Product Designers
- 41. @jacdevos jacques@nreality.com Don’t build software, design it! Questions?
- 44. @jacdevos jacques@nreality.com Links: Wicket Problems: http://www.leanessays.com/2002/01/wicked-problems.html?m=1 Waterfall 1970: https://www.cs.umd.edu/class/spring2003/cmsc838p/Process/waterfall.pdf Code is Design: http://www.developerdotstar.com/mag/articles/reeves_design.html Design Thinking: https://en.wikipedia.org/wiki/Design_thinking Design School: http://dschool.stanford.edu Design Sprint: http://www.thesprintbook.com Lean Startup: http://theleanstartup.com/ Lean Startup meets design thinking: https://youtu.be/bvFnHzU4_W8 Extreme Programming: https://www.amazon.com/Extreme-Programming-Explained-Embrace- Change/dp/0321278658 Continuous Delivery: https://www.amazon.com/gp/product/0321601912
Editor's Notes
- Key point 1: Wrong Mental Model most problems in software is caused by a model mismatch: programming and testing are design and not a construction activities Key point 2: Scrum or XP: with the wrong mental model will delivery same results. Key point 3: Right Mental Model: DESIGN. feedback, collaboration and rework produces tasty designs - although it can be budget controlled, it does NOT fit feature by feature on a Gantt chart Key point 4: Things just fall into place: when you have the right mental model.
- Wrong! I will show you that you don’t
- Although ”software is eating the world” development is still misunderstood, I want to share the lessons I learnt, that cleared up misconceptions in software development
- So if design is a better model for programming WeStep away from software development specifically Head of tasting Tasty design: how to create natural flavored rum
- Needs driven, spine model
- Shout out to the spine model – we cannot solve problems if we don’t start at the needs Talk to customers directly Empathise rum drinkers
- Spend time on the problem
- Build and make
- Test with user
- Design is a process, a iterative process. If someone talks about designer clothing or design jewellery, it does not mean it was built by a design but that it went through a design process (and although hard, anyone can follow a design process)
- I don’t drink rum.
- cannot be clearly defined don’t have clear success criteria don’t have simple root causes! only when you have the complete solution do you understand the problem completely
- https://www.cs.umd.edu/class/spring2003/cmsc838p/Process/waterfall.pdf
- Things just fall into place when you have the right mental model Delivering iteratively just makes sense
- http://www.developerdotstar.com/mag/articles/reeves_design.html
- http://www.developerdotstar.com/mag/articles/reeves_design.html Revees - 1992: software is design fell on death ears
- He had a insight that invalidates this model. Machine code
- High-level design still has a place. We code more than we would normally do
- http://www.developerdotstar.com/mag/articles/reeves_design.html
- I love Kanban, Scrum, XP and the Agile Principles – but I often see it failing due to not really understanding the essence of why its effective. The reason why it worked in New New Product Development game is lost on many many thousands of Scrum teams. We failed to see this even with Scrum, we did not address the essence of iterative
- It is a design document after all
- It is a design document after all
- It is a design document after all
- High-level design still has a place.
- Checking (the automated verification) – has a different purpose
- Eureka moment
- I think software developers should be involved as designers!
- What work is better, more fun, more productive, more fulfilling than design work. Even designing test cases/ acceptance criteria you design to measure if the intent was met...