Anatomy of a Snowflake Goto Amsterdam 2012 you are here eBay - - PowerPoint PPT Presentation

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Anatomy of a Snowflake Goto Amsterdam 2012 you are here eBay - - PowerPoint PPT Presentation

Apr 12, 2023 102 likes •711 views

Bartosz Kiera Anatomy of a Snowflake Goto Amsterdam 2012 you are here eBay Classifieds Group http://www.ebayclassifiedsgroup.com My road to Agile Patterns are evil The Fantastic 4 My road to Agile yes, thats a process now Im

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Anatomy of a Snowflake

Bartosz Kiera Goto Amsterdam 2012

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eBay Classifieds Group http://www.ebayclassifiedsgroup.com

you are here

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My road to Agile Patterns are evil The Fantastic 4

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My road to Agile

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yes, that’s a process

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now I’m convinced...

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FOS - Flight Operation Suite QUE - Communication & Alerting TOP - Aircraft Performance Tool FIDS - Flight Information Display System FIDS - Flight Information Display System BRF - Briefer LST - Weight & Balance ULD - ULD Control WXS - Weather Station NTM - NOTAM Management FLW - Flight Watch CDM - Crew DX IFS Briefer - Globe

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6 developers 2 testers

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Optimizing Predictable Defined Repeatable Ad hoc this way up

CMM

what if our ad hoc is the optimizing?

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6 developers 2 testers

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6 developers 2 testers

3

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FOS - Flight Operation Suite QUE - Communication & Alerting TOP - Aircraft Performance Tool FIDS - Flight Information Display System FIDS - Flight Information Display System BRF - Briefer LST - Weight & Balance ULD - ULD Control WXS - Weather Station NTM - NOTAM Management FLW - Flight Watch CDM - Crew DX IFS Briefer - Globe

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no I didn’t

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phone call implementation test rollout

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ah, good times...

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I learned it the hard way

Agile

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Agile

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Patterns are evil

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A clerk at a butcher shop stands five feet ten inches tall and wears size 13 sneakers. What does he weigh? In British Columbia you cannot take a picture of a man with a wooden leg. Why not? Which is correct to say, “The yolk of the egg is white”

  • r “The yolk of the egg are white?”
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A clerk at a butcher shop stands five feet ten inches tall and wears size 13 sneakers. What does he weigh? In British Columbia you cannot take a picture of a man with a wooden leg. Why not? Which is correct to say, “The yolk of the egg is white”

  • r “The yolk of the egg are white?”

Meat You can’t take a picture with a wooden leg. You need a camera (or iPad or cell phone) to take a picture.

  • Neither. Egg yolks are yellow.
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We see what we want to see and what we expect to see

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Yet Another Technology (?)

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I love the familiar. I categorize.

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implement

  • bserve
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implement

  • bserve
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Which fits better?

define “fits better”?

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quick solution code to compare things done better focus on the problem emerging patterns more than a sum of its parts

Emergent Design

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relevant complex

the good the bad the ugly

irrelevant simple

Solution

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Emergent design - HOW-TO

  • 1. Satisfy your immediate needs.
  • 2. Observe the patterns and adapt the solution.

focus on the what (relevancy) focus on the how(simplicity)

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public void setProduct(String productAlias) { this.product = Product.from(productAlias); }

relevant? simple?

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public void setProduct(Product product) { this.product = product; } public class ProductEnumConverter extends PropertyEditorSupport { @Override public void setAsText(final String productAlias) throws IllegalArgumentException { setValue(Product.from(productAlias)); } } @InitBinder public void initBinder(WebDataBinder binder) { binder.registerCustomEditor(Product.class, new ProductEnumConverter()); } <bean class="org.springframework.beans.factory.config.CustomEditorConfigurer"> <property name="customEditors"> <map> <entry key="domain.model.product.Product" value="domain.infrastructure.ProductEnumConverter"/> </map> </property> </bean>

relevant? simple? +

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Agile

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Agile

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Agile

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Agile

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Agile

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Agile

is it? Scrum much?

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Question 1 - Iterations No iterations - 0 Interations > 6 weeks - 1 Variable length < 6 weeks - 2 Fixed iteration length 6 weeks - 3 Fixed iteration length 5 weeks - 4 Fixed iteration 4 weeks or less - 10

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You loose 2 points if your requirements are good but not user stories

Question 3 - Agile Specification No requirements - 0 Big requirements documents - 1 Poor user stories - 4 Good requirements - 5 Good user stories - 7 Just enough, just in time specifications - 8 Good user stories tied to specifications as needed - 10

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Planning poker is worth 3 points

Question 6 - Estimates Product Backlog not estimated - 0 Estimates not produced by team - 1 Estimates not produced by planning poker - 5 Estimates produced by planning poker by team - 8 Estimate error < 10% - 10

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Agile FTW (WTF?)

“We give this test to Scrum teams at OpenView Venture Partners and to their portfolio companies as the venture group does not expect good performance

from Scrum teams without passing the Nokia test. They are also very interested in predictability of release dates which is impossible without passing grades on the test.”

Jeff Sutherland

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“The Nokia Test? I hope you’re not expecting to graduate just because you passed.”

Brad Murphy, Founder & CEO of Gear Stream

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Matryoshka syndrome

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We can’t change it, because then it’s not Scrum anymore.

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Functional completeness

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Functional completeness

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Agile = Common sense

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And a pinch of crazy

Individuals & interactions

In-house coaching

Pair programming

Experimenting

(Passionate) discussions

Flat structure

Visibility

Trust Great People

Outings

Open space

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The team

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git push

Working software

Emergent design

Hive mind

Experimenting

Evolutionary architecture

TDD

Visibility

Continuos deployment

BDD DDD

Trust

Monitoring

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One for all - all for one

Customer collaboration Flat structure

Experimenting

Hive mind Visibility

One team Trust

User testing Beta

Open space

(Passionate) discussions Outings

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One for all - all for one

Responding to change

Continuos deployment

Experimenting

Hive mind Visibility TDD

Trust

Let it hurt Last responsible moment

Real priorities

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Be Agile.

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More?

bkiera@ebay.com @useresu mutablenotions.wordpress.com tinyurl.com/nf-ead Neal Ford http://www.thoughtworks.com/emergent-design

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Start complaining. That was your training.

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Thank You!