Ayesha Bagus-Casker and Lorraine Steyn: Regional Scrum Gathering South Africa 2019 Presentation - Cape Town

1. Ayesha Bagus-Casker @Ayesha_bagus
Lorraine Steyn @lor_krs
Event Storming

2. Event Storming

4. Fear of asking “stupid” questions
Unconscious bias and assumptions
Not speaking the same language
Assuming that what you see is all there is
(psychological safety)
(make implicit -> explicit)
(domain terms, natural language)
We think we agree! Now we really get it!

5. The 3 rules
The right people in the room
Unlimited modelling space
Limited time (+-2 hours)

6. Events
Something that has happened (that matters).
Past Tense.

7. Hot Spots
Use this to park “problems”
Whenever we encounter:
 a question we cannot answer
 something that does not seem right
 or any problem we should look into

8. External Systems
Anything outside of the modeled domain.

9. Exercise
Organise events into a timeline
Start
Event
Timeline
…

10. Poké Bowl
Domain
We are introducing
Poké Bowls to our
city with our new online
ordering POKECO app

11. BUILD YOUR OWN BOWLS (BYOB)
Bowls start at Regular R50 / Maxi R70
STEP 1: CHOOSE YOUR BASE
Sticky Rice
Kale & Red Cabbage
Glass Noodles (+ 10)
Brown rice (+ 10)
Quinoa (+ 15 / 20)
STEP 2: PICK A PROTEIN
Tuna Sashimi (+ 45 / 59)
Salmon Sashimi (+ 55 / 69)
Prawn (+ 35 / 45)
Shredded Chicken (+ 20 / 25)
Tofu (+ 20 / 25)
STEP 3: TOP IT OFF (max 4)
Mango / Papaya Salsa
Orange
Pineapple
Cucumber
Sweet Red Onion
Carrot
Red Cabbage
Etc.
STEP 4: ADD CRUNCH (max 1)
Crunchy Noodles
Toasted Almond flakes
Toasted Macadamia nuts
Toasted Coco flakes
Shredded Nori (seaweed)
Crispy Wasabi Salmon Skin
STEP 5: DRESS IT (max 2)
House shoyu (soy - sesame oil) (v)
House ponzu (soy - citrus) (v)
Ginger ponzu (soy - ginger citrus)(v)
Hawaiian heat (soy - pineapple spice(v)
Creamy togorashi (sriracha mayo -soy)
Creamy wasabi (wasabi mayo - soy)
Miso tahini (miso sesame mayo - soy)
Gluten Free Tamari ( + 10) (v)
STEP 6: ADD EXTRA TOPPINGS
Avocado (+ 15 / 20)
Edamame (+ 10 / 20)
Tobiko Caviar, Seaweed Salad (+ 5 / 10)
Almond flakes (+ 10 / 15)
Macadamia nuts (+ 10 / 15)
Additional Sauce (+ 6)
Etc.

12. Online Ordering Domain Rules
1. Select size of bowl: Regular or Maximum
2. Select a base (required)
3. Select Ingredients from each section (optional)
4. Assume all ingredients are in stock
5. Collection in-store, or free delivery
6. Returning customers may choose to pay C.O.D.
7. New customers must pay online

13. Feedback

14. Command
Confirm
Order
A business process that results from an event.
Present Tense.

15. Actor
Role or user in the domain (persona)

16. Read Model
The information needed to make a Decision.

17. Policy
Business rules

18. Online Ordering Domain Rules
1. Select size of bowl: Regular or Maximum
2. Select a base (required)
3. Select Ingredients from each section (maximums)
4. Warn if client is missing anything they are entitled to
5. Some ingredients cost extra
6. Assume all ingredients are in stock
7. Collection in-store, or free delivery
8. Returning customers may choose to pay C.O.D.
9. New customers must pay online

19. Feedback

20. The models are a byproduct
of conversations, and it’s those
conversations that are the real value.
Kevin Webber

21. Alberto Brandolini @ziobrando
krs.co.za/training

22. Questions?
www.krs.co.za @lor_krs @ayesha_bagus