rethinking enterprise software

Rethinking EnterpriseSoftware

@ziobrandoThursday, September 19, 13

What do I do?

Who am I?

Thursday, September 19, 13

What do I do?

I do other things instead

Who am I?


Enterprise software


Ignorance is the single greatest impediment to

throughput.

Dan Northhttp://dannorth.net/2010/08/30/introducing-deliberate-discovery/


http://dannorth.net/2010/08/30/introducing-deliberate-discovery/


Learning is the constraint

Dan Northhttp://dannorth.net/2010/08/30/introducing-deliberate-discovery/




...maybe not the only one...


When doing DDD...


Software development is a learning process

Working code is a side effect


Learning


MemoriesThursday, September 19, 13

Learning


LearningSchool


LearningSchool

Bo

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gThursday, September 19, 13

LearningSchool

Bo

rin

g

Study


LearningSchool

Bo

rin

g

Study

Less

on


LearningSchool

Bo

rin

g

Study

Less

on

Exp

erim

ent


LearningSchool

Bo

rin

g

Study

Less

on

Exp

erim

ent

Mistakes


LearningSchool

Bo

rin

g

Study

Less

on

Exp

erim

ent

MistakesFun


LearningSchool

Bo

rin

g

Study

Less

on

Exp

erim

ent

MistakesFun

Marks


LearningSchool

Bo

rin

g

Study

Less

on

Exp

erim

ent

MistakesFun

Marks

Exams


LearningSchool

Bo

rin

g

Study

Less

on

Exp

erim

ent

MistakesFun

Marks

Exams

Stre

ss


LearningSchool

Bo

rin

g

Study

Less

on

Exp

erim

ent

MistakesFun

Marks

Exams

Stre

ss

LifeThursday, September 19, 13

Learning is so important, and yet we don’t know

much about it


Learning is non linear


Learning is non linear

(doesn’t fit into spreadsheets, burndown and Gantt charts)


Stress

Psycological reaction

To an adverse situation

Situation is perceived as inevitable


Braincan’t learn under

stress


Relax


Conformity kills creativity


Pressure hurts problem solving


Can’t actually predict when the

learning will happen


Guaranteed?


Coding against an ecosystem


Coding against an ecosystem

How do we measure effect on an ecosystem?


Value Stream Mapping

http://agile.dzone.com/books/continuous-delivery-freeThursday, September 19, 13

http://agile.dzone.com/books/continuous-delivery-free

http://agile.dzone.com/books/continuous-delivery-free

A quickernotation..


Coding 20cl, learning 20cl, deciding 20cl, waiting...


Mutual waiting


Mutual waiting

Apparently, a process and organization issue...


Learning is not the only constraint


Deciding?


We’re damn bad at it


How many DDD practitioners are

needed to name a class?


We should really find a name for our

daughter...



daughter...

Isn’t a GUID sufficient?



daughter...


No, a proper name...



daughter...


No, a proper name...

What about Foo now, and refactor later?


Should I marry her?

YesNo


We really should be getting married soon...


We really should be getting married soon...

Can we talk about this another time, dear? I’m facing a zerg assault right

now...


The strategy?


Deadline!


Wedding cerimony is a Ponzi schema

designed to stop the man procrastinating


...but can we stop afterthoughts?


I really should have married Kate

instead...


I really should have married Kate

instead...

...and used MongoDB in that

project


Problem


Ubiquitous LanguageReloaded


Model Affinity


Domain Events work better


here the user decidesCommand

User

issues

influences

External information

influencesRead Model


Quali informazioni


Fine-Grained Delegation

Management 30.com


Steal and tweak


Process fine tuning


Growth engine


3 model archetypes

-Collaborative construction

-Execution

-Tracking & Control


Engagement


meaningful conversation with the domain expert


“...Eric?”


...even better!Thursday, September 19, 13

Hack!


Hack!

Warning: DDD doesn’t work on the Death StarThursday, September 19, 13

Gamification!


Constraints


Constraints

Rules


Constraints

Rules

TimeboxingThursday, September 19, 13

Let’s collect key events for our domain

Let’s place events on a timeline

Look for pre- and post-

An event is something meaningful that happened in our domain.We can express it as a verb in the past. Es. “Payment Received”We can model it with an orange sticker like...

Ask the domain expert if necessary


Space


Yes, I mean that much space...


Can’t see big problems in a little

space


Context is constraining the solution space


Take control of the constraints


Some great ideas here...

BDD

Specification by example

Concrete scenarios


Solution Space


Short timeboxesthrowaway code

...more ;-)

coderetreat.orgThursday, September 19, 13

coderetreat.orgThursday, September 19, 13

Can we tweak it?


Conflict resolution


The only thing they agree on is fooling us!


They’re both right!

Context A

Context B


whew!


Tool Affinity


Simple notation


How long is this cycle?


What about ...minutes?


Me and UML...Thursday, September 19, 13

...Waiting


We’re changing the ecosystem...


But most of all...


Experience!


Experience!

...as an imperative verbThursday, September 19, 13

[email protected]

@ziobrando


mailto:[email protected]

mailto:[email protected]

rethinking enterprise software

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