Before we begin . . .
Go to the "voting" table we've setup at the back.
Vote on whether you've tried to introduce DDD to your company and rate how successful it's been.
Introducing DDD to your Company
@ie_ddd
@barryosull
@daraghoshea
https://www.dddireland.org
https://www.barryosull.com
https://www.daraghoshea.com
Sponsored by:
Introducing DDD to your company.
The Meetup:
- Why introduce DDD?
- How to introduce it
- Dos and Donts
- Three Techniques
- Group Discussion
- Networking
Meetup Structure
Why introduce DDD?
Let's discuss why you want to introduce it.
What value will it bring and why?
(10 mins)
Consistent language between dev & business
Better Software
Strategic alignment
Architecture that helps build solutions
How to introduce it?
Dos:
- Focus on the problems stemming from not using DDD
- Demonstrate that DDD can fix these problems
- Use the businesses language
- Empathise
​Donts:
- Focus on the name and its technical aspects
- Hype them up about how technically cool it is
- Evangelicise about it out of the blue
You're selling the concept.
So sell it!
Don't Just Talk
Demonstrate Value
Three known techniques
1. Event Storming
Go into a room and event storm a new feature with the product owner and/or domain experts.
1. Event Storming Tips
- Focus on events and constraints
- Ask what things are called, be curious and listen
- Don't use technical language
- Don't hype up the event storming concepts, just do it!
- Iterate on the solution space
- Let business owners critique and break models
- Make business owners aware of complexity/cost
2. Talk with the domain experts
2. Talk with the domain experts tips
- Use their language in conversations, not yours
- When a feature request is missing concepts, don't make up language among yourselves, reach out and ask them
- Rename code concepts to match their language
- Get them in a room, draw your understanding on a whiteboard, get them to confirm/deny
- The PM/PO may not be the domain expert
3. Separate Domain Code from Infra Code
3. Separate Domain Code from Infra Code Tips
- Reduces noise, allows you to begin to see the domain
- Ask business owners what things are called
- Allows you to write tests for domain constraints
- Allows you to test infra independently
- Can be done piece by piece
- Requires buy in from developers/architects
Discussion
How could you introduce DDD to your company?
- Break into teams of 4
- Discuss various ways to do introduce DDD
- After 20mins, present your ideas to the group
Next meetup
Lightning Talks: Real world DDD Experiences
Modelling Constraints: Defining our systems
or
Which do you prefer?
Before we begin . . . Go to the "voting" table we've setup at the back. Vote on whether you've tried to introduce DDD to your company and rate how successful it's been. Introducing DDD to your Company