Developing Domain Storytelling, or: How DDD influenced modeling practices

Starring With Directed by Written by

@hofstef

Foto: Rameessos/Wikipedia

@hofstef Spark a fire Tell a story Paint a picture

@hofstef business gibberish { nerd; speek; } Domain Expert Software
Expert

@hofstef Fach- sprache Domain Expert Software Expert

@hofstef 1. Demo 2. Explanation 3. Influence of DDD

@hofstef Let‘s build a software system to approve roadwork!

@hofstef We need support when reviewing applications The system must
support hearings ??? The system must support issuing permits

@hofstef

@hofstef ABSTRACT PROCESSES

@hofstef A good example is better than a bad abstraction.

@hofstef CONCRETE STORIES

@hofstef Scope

@hofstef

@hofstef Pictographic Language

@hofstef actor work object activity annotation

@hofstef customer ticket buys

@hofstef person people system

@hofstef …asks about the reservation …sends the reservation to …prints
the reservation reservation reservation reservation asks about prints to sends

@hofstef „The cashier gives the ticket to the customer.“ gives
ticket customer cashier to

@hofstef

@hofstef Workshops

@hofstef Listeners

@hofstef

@hofstef Egon.io

@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 for buying options.

@hofstef

@hofstef •Analyze domain •Model as-is domain stories Domain Stories •Design
new processes •Model to-be domain stories Domain Stories •Derive requirements •Coarse-grained to medium-grained Requirements •Develop iteratively & incrementally •Refine requirements constantly Software

@hofstef

@hofstef I) The model exploration whirlpool.

@hofstef

@hofstef II) Collaborative Modeling (CoMo)

@hofstef Paul Rayner‘s 3 pillars* of DDD (as explained at
Explore DDD 2018) *) plus Ubiquitous Language as an overarching principle Picture: Martin Schimak @martinschimak

@hofstef

@hofstef III) Language and models are bounded by their context.

@hofstef

@hofstef First-time user signs up and plays first game NO!
The account is created much later! NO! Your are wrong! This IS the first step!

@hofstef “A single conceptual model is a tricky beast to
work with.” - Martin Fowler

@hofstef First-time user signs up and plays first game

@hofstef

@hofstef I) The model exploration whirlpool II) Collaborative Modeling (CoMo)
III) Language and models are bounded by their context

@hofstef 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

Developing Domain Storytelling, or: How DDD influenced modeling practices

Developing Domain Storytelling, or: How DDD influenced modeling practices

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