W-JAX 2017 Keynote. It's a small world after all. How thinking small is changing software development big time

It’s a small world
after all
Sander Hoogendoorn
ditisagile.nl
Mentoring ▪ Consulting ▪ Training
Agile ▪ Software architecture ▪ Code
@aahoogendoorn

Sander Hoogendoorn
Independent dad, software architect,
agile coach, programmer, speaker, writer
CTO ANVA
Former CTO insurance company
Former global agile thoughtleader
Capgemini
sanderhoogendoorn.com
aahoogendoorn
aahoogendoorn
sander@ditisagile.nl
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@aahoogendoorn | www.ditisagile.nlIt’s a small word after all 7

The times
they are
a-changing
Faster than you think
Read more …
Hallo

Read more …
Moore’s Law
The number of transistors in
a dense integrated circuit
doubles approximately
every two years.

The IBM Personal
Computer 5150
The simplest configuration has 16K on-
board RAM and uses an audio cassette to
load and save data. A floppy drive is
optional. A hard drive was not supported.
A system for home or school with a
memory of 64K bytes, a single diskette
drive and its own display, was priced
around $3,000.
Buy now

Amazon EC2
Then, in 2006, Amazon launched its
Elastic Compute cloud (EC2) as a
commercial web service that allows
small companies and individuals to rent
computers on which to run their own
computer applications.
Hallo

Where software goes wrong
Hallo
Continue

Add another feature And never look back

Too much
dependencies
will kill you
every time
Continue

Read more …
Welcome to the
world of small
moveable parts

Even
shorter
cycles
Beyond agile
and Scrum
Minimal
viable
products
Stop doing
projects
Even
smaller
teams
Autonomous and
self-organising
Even
smaller
components
Microservices

The
continuous
culture
Everything will
be continuous

Less is more
Deliver minimal viable products, not projects
Submit

Complex problems require continuous exploration

The iron triangle of project management

Stop planning

Read more …
Minimal
viable
products
Think small,
deploy early and
frequently

Roadmaps over plans
While there is value in the items on the right, we value the items on the left more
Continue

Do we need this
NOW?

Less estimates

Even
shorter
cycles
Agile
beyond
Scrum
Continue

What does agile mean to you?

Does agile scale? Is large scale agile just multiple copies of Scrum?

Or does large scale agile require a large scale process?

Let’s all copy Spotify!
You are not Spotify!
(unless you actually are Spotify)

Read more …
Does agile
scale?
If you don’t succeed at agile
with a 5-person team,
what makes you think you’ll
succeed at enterprise level?

The red sprint anti-pattern

Stop
sprinting
Wouldn’t it be nice?
Next

To satisfy the customer through early and
continuous delivery of valuable software
Agile manifesto

How often do you release to production?

Continuous delivery
An approach in which teams ensure that every change to
the system is releasable, and that we can release any
version at the push of a button.
Aimed to make releases boring, so we can deliver
frequently and get fast feedback on what users care about.Jez Humble

Continuous flow

Delivery pipelines Fully automated deployment machinery

Automated testing
delivers continuous feedback
Fail fast, fail often, fail forward

Immutable infrastructure Pets versus cattle

Smaller teams Do we mean 7 plus or minus 2?

Autonomous teams

Mandatory fun Maybe we’re overdoing it a bit?

Less rules Amsterdam, Alexanderplein
Continue

Traditional teams Agile teams Micro-teams

Team is a pool of people with all the right skills
Often with a ‘technical leader’
Single backlog of small work items
Kanban style board
Small teams form and disband dynamically to
implement epics
Often two to three members
Let the team decide
Product owner becomes an analyst
As little estimates as possible
Stand-ups with whole team
Retrospective on request
Micro-teams
Next

Continue
Allow teams to learn
continuously

Even smaller
components
The world of microservices
Continue

Monoliths Hard to deliver. Harder to test. Impossible to maintain. But…

Lunde’s Law
Given sufficient time any group of
programmers will decide to rewrite
the code.Ron Lunde

Microservices
In short, the microservice architectural style is an approach
to developing a single application as a suite of small services,
each running in its own process and communicating with
lightweight mechanisms, often an HTTP resource API.
These services are built around business capabilities and
independently deployable by fully automated deployment
machinery. There is a bare minimum of centralized management
of these services, which may be written in different programming
languages and use different data storage technologies.
Martin Fowler

Monoliths versus microservices?
MÖNÖLIT
MICRØ

AWS Lambda & Azure Functions Even smaller

Distributed systems
Oh and by the way… Doing microservices
(or serverless computing) means that you
are building distributed systemsMe

@aahoogendoorn | www.ditisagile.nl
In retrospective
Some final thoughts

Complex problems require continuous exploration

Beyond the point of no return

@aahoogendoorn | www.ditisagile.nl
References
and questions
www.sanderhoogendoorn.com
www.ditisagile.nl
aahoogendoorn
aahoogendoorn
sander@ditisagile.nl

W-JAX 2017 Keynote. It's a small world after all. How thinking small is changing software development big time

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W-JAX 2017 Keynote. It's a small world after all. How thinking small is changing software development big time