Domain Storytelling DDDEU 2022

Slides for the 1 day workshop (https://2022.dddeurope.com/program/domain-storytelling) and 2h hands-on lab (https://2022.dddeurope.com/program/domain-storytelling-a-practical-introduction) at DDD Europe 2022.

For the hands-on, only some of the slides have been used.

Transcript

1. Brought to you by WPS – Workplace Solutions GmbH.
2. @hofstef @hschwentner
3. Foto: Rameessos/Wikipedia
4. @hofstef @hschwentner Spark a fire Tell a story Paint a picture
5. @hofstef @hschwentner business bla bla { nerd; speek; } Domain Expert Developer
6. @hofstef @hschwentner Fach- sprache Developer Domain Expert
7. @hofstef @hschwentner Schedule • Introductions • Demo • The Basics • Scope & Workshop Format • Purpose: Finding Boundaries • Practicing with different scopes • Purpose: Requirements • Real-world examples • We Model Your Domain!
8. @hofstef @hschwentner
9. @hofstef "From a story to working software – this book helps you to get to the essence of what to build. Highly recommended!" – Oliver Drotbohm Available as e-book and in print. Check out https://domainstorytelling.org/book for details.
10. @hofstef @hschwentner @hofstef @hschwentner Pictographic Language (Book Chapter 2)
11. @hofstef @hschwentner actor work object activity annotation
12. @hofstef @hschwentner risk manager contract votes
13. @hofstef @hschwentner person people system
14. @hofstef @hschwentner contract passes on signs contract
15. @hofstef @hschwentner The sales person passes the contract on to the risk manager. passes on RISK MANAGER SALES PERSON to CONTRACT
16. @hofstef @hschwentner 1 1 1
17. @hofstef @hschwentner CUSTOMER 1 SALES- PERSON 2 CAR INSTALLMENT CONTRACT
18. @hofstef @hschwentner 4 5 CUSTOMER CONTRACT CONTRACT
19. @hofstef @hschwentner @hofstef @hschwentner Scenario-based Modeling (Book Chapter 3)
20. @hofstef @hschwentner ABSTRACT PROCESSES
21. @hofstef @hschwentner SCENARIO
22. @hofstef @hschwentner A good example is better than a bad abstraction.
23. @hofstef @hschwentner Draw here Leave some empty space there → Annotations, variations, and purpose Preconditions, assumptions, and triggers
24. @hofstef @hschwentner Modeling Tools (Book Chapter 5)
25. @hofstef @hschwentner
26. @hofstef @hschwentner
27. @hofstef @hschwentner Miro, PowerPoint, Viso, draw.io… asks for Reservation (movie, time, seats) cashier movie-goer 1 Screen plan finds available seats in CineSoft 2 seats recommends 3
28. @hofstef @hschwentner Egon.io
29. @hofstef @hschwentner Welcome to your (client’s) cinema!
30. @hofstef @hschwentner Exercise 1 Going to the Movies (Overview)
31. @hofstef @hschwentner Workshops (Book Chapter 6)
32. @hofstef @hschwentner Listeners
33. @hofstef @hschwentner
34. @hofstef @hschwentner Scope (Book Chapter 4)
35. @hofstef What? Why? How? by Baggeb - pixabay license
36. @hofstef @hschwentner
37. @hofstef @hschwentner Finding Boundaries (Book Chapter 10)
38. @hofstef @hschwentner
39. @hofstef @hschwentner Heuristic: Look for activities that - from an actor’s perspective - belong together.
40. @hofstef @hschwentner Indicator: only one actor involved xyz sub-domain
41. @hofstef @hschwentner Indicator: one-way information flow abc sub- domain xyz sub-domain
42. @hofstef @hschwentner Indicator: different triggers abc sub- domain xyz sub-domain
43. @hofstef @hschwentner Exercise 2: Find and visualize boundaries in your coarse-grained Domain Story (from Exercise 1)
44. @hofstef @hschwentner Language and models are bounded by their context.
45. @hofstef @hschwentner
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47. @hofstef @hschwentner “A single conceptual model is a tricky beast to work with.” - Martin Fowler
48. @hofstef @hschwentner Exercise 3: Model the ticket sales process (as-is)
49. @hofstef @hschwentner Exercise 4: Model the ticket sales process (to-be)
50. @hofstef @hschwentner Working with Requirements (Book Chapter 11)
51. @hofstef @hschwentner From Domain Stories to User Stories
52. From Domain Story to User Story Domain Story User Story Actor → Actor (Who?) Activity → Goal (What?) Activity, Annotation, verbal → Purpose (Why?)
53. @hofstef @hschwentner Purposes (Book Chapters 9-15)
54. • Learning Domain Language • Finding Boundaries • Working with Requirements • Modeling in Code • Supporting Organizational Change • Deciding Make or Buy and Choosing Off-the-Shelf Software • Finding Shadow IT
55. @hofstef @hschwentner Web: https://domainstorytelling.org Twitter: @hofstef #DomainStorytelling Slides: https://speakerdeck.com/hofstef Book: https://www.informit.com/domain-storytelling The pictures used in this talk are public domain, unless noted otherwise. Screenshots and examples © WPS - Workplace Solutions GmbH
56. @hofstef @hschwentner