Waste Driven Development - Agile Coaching Serbia Meetup

Waste Driven
Development
Lean Thinking for
Software Developers
LEMi ORHAN ERGiN
agile software craftsman @ iyzico
Fighting with

LEMi ORHAN ERGiN
/lemiorhan
lemiorhanergin.com
@lemiorhan
agile practice lead at iyzico
Sony, eBay/GittiGidiyor & ACM
founder of Software Craftsmanship Turkey
ex product owner of Agile Turkey Summit
organized 200+ meetups and 3 conferences

we are naive
optimistic by default
assumes all goes well
of course we’ll succeed

and over-confident
super heroes
smartest guy on planet
write perfect code
design the best
do it right for the first time
understand customer needs
manage people & projects
build elegant solutions

http://imgur.com/a/Smr5d
Are you scared of
touching your source code?
Welcome to the club!
Legacy code consumes your life energy,
sucks your blood, forces you hack your
code to survive. Therefore we call it
zombie software, not legacy anymore

http://youhadonejob.org
Less than 0.01 percent
That’s how many consumer mobile apps will
be considered a financial success by their
creators at the end of 2018, according to
new research from Gartner Inc.
http://www.forbes.com/sites/connieguglielmo/2014/01/13/
mobile-apps-may-not-pave-the-way-to-developer-riches-sales-
average-less-than-1250-a-day
Mobile Apps Won't Lead To Riches For Most Developers
by Connie Guglielmo

http://boeingboeing2.deviantart.com/art/Well-time-to-fly-another-airline-516735690
Licensed under Creative Commons BY-NC 3.0
We have time to fix bugs,
but no time for writing better
We don’t refactor and write tests
because we don’t have enough time.
But we have time for debugging,
hacking code and fixing bugs.

http://forgifs.com/gallery/v/Funny/Unloading-cement-pipe-onto-tires.gif.html
Processes do not
build products,
but people do
Processes help people improve the
way they build products, increase
motivation and cultivate an
healthy environment. In the end,
the efficiency of processes are
important, but people are crucial.

build the wrong thing
build the thing wrong
poor quality
bugs and defects
slow and unproductive
endless dependencies
redundant tasks
drowned in waste
error error error error error

the languages we code
the technologies we use
the refactorings we need
the dependencies we have
the processes we follow
the feelings we have
Customers don’t care

their problems to be
understood and solvedCustomers really care

think like a
Customer
our job should be
maximizing the values
we can deliver

Maximizing value
for the end customer
by removing waste
LEAN is a MINDSET

value Any action or process that a
customer would be willing to pay for

doesn’t add value to the product
makes you slow down
decrease productivity
makes us open to do mistakes
increase comlexity
WASTE

Let’s
find waste
and eliminate
in software development

more code more defects
Industry average is about
15 - 50 errors per 1000 lines  
of delivered code.
Steve McConnell
from of the book “Code Complete”

valueless developments
The very first value
of software is
to tolerate and facilitate
on-going changes
Robert C. Martin

Working topics on the left does not mean
we are good at using the topics on the right

debugging
bug fixing
manual deployments
manual testing
unmerged branches
big upfront design
comments
LOGGING
framework addiction
highly coupled design
bıg RELEASES
no security concerns HAVING SILOSpackage organization

FOCUS ON DESIGN & QUALITY
Design Patterns
Refactoring Techniques
OOP/FP/RP Principles
Clean Code Principles
Automated testing
Acceptance testing
Test Driven Design (TDD)
Code review techniques
Pair programming culture

KEEP YOUR REPO TINY
Slit your code into multiple modules / plugins
Keep your commit graph clean
Never allow long-living branches
Do not hesitate to delete code
Refactor code via SOLID principles
Keep independent parts in separate repos
Maintain modules in a single mono repo

“We zombify people by using wrong practices”
Niels Pflaeging
Management Exorcist
from his talk at Agile Turkey Summit 2014

Develop and refactor
Evolutionary design
Fully automated testing
Make codebase clean
Frequent short releases
Reproduce in test and fix
Get feedback and release
Develop and refactor
Evolutionary design
Fully automated testing
Make codebase clean
Frequent short releases
Reproduce in test and fix
Get feedback and release
Develop and bug fix
Big upfront design
Manual testing
Add comments to codebase
Big releases
Fix and test
Release and get feedback

waste driven development
Long-lasting defects
99% done tasks
Rework at the end
Missing continuous integration
Manual release steps
Working alone
Only author knows the code
Unsynchronized branches
Hesitation to commit the changes
Manual testing again and again

Long-lasting defects
99% done tasks
Rework at the end
Missing continuous integration
Manual release steps
Working alone
Only author knows the code
Unsynchronized branches
Hesitation to commit the changes
Manual testing again and againDesign by Tests (TDD)
Calculate defect resolution times
think differently
success
Define definition of done and obey
Refactor continuously
Keep feature branches short
Automatic release steps
Program in peers and as the whole team
Never release unreviewed code to prod
Checkin codebase frequently
Commit early, commit often, perfect later

define standards
everyone should have same understanding and base
Analysis
Testing
Architecture
Release & Deployment
Bug Fixing
Database Structure
Error Handling
Logging
Quality Metrics
Web Services / API
Coding / Naming
Code Review
Commit Messages
Messaging

version everything
continuous delivery starts with efficient use of SCMs
Source code
Deployment scripts
Application configuration
Auto generated codes
Automated tests
Static content (like images)
Rewrite rules
Server configurations
Database schema changes
Dependency configurations

automize everything
remove waste, push to extremes, slow down to go fast
Running unit tests
Building / packaging
Code analysis
Deployments
Functional testing
Releases
Cache cleanup
Performance monitoring
Regression testing
Rollbacks
Scaling
Integration of all commits
Notifying warning or errors
Reporting

radical transparency
openness, honesty, collaboration and improvement requires
Release dates
Critical defects in production
Status of the project
SLAs (Service Level Agreements)
Bugs in new features
Agreed standards
Deﬁnition of Done
Names of on-call support people
Quality metrics of the software
Velocity of the team
Lead and cycle times
Business value delivered
Moods of team members
Vacation dates of people

foreword
Documentation is not a way of communication

It’s sad, but have to admit
No one reads our documentation
Even we do not read what we write
Information becomes obsolete too fast
Reading analysis is too booooring!

really ???
Developers write documents A LOT

Commit messages
Branch names
Commit graph
Log messages
Production code
Test code
Release notes
Code review comments
Developers write documents
Configurations
Message flows
User guides
Module designs
Standards and guidelines
Support knowledge base
Flow diagrams
API documentation

never
ending
story
Estimations
Management practices
Performance appraisals
Status Tracking
Time Tracking
Control of working hours
Working at office
Overtimes
Meetings
Dress codes
Clean desk policy
Tools and OS
Turnovers
Motivation
Micro management
Office space

challenge your paradigms
Visualize the flows and observe
Detect waste and the root causes
Take action to improve
Inspect and Adapt

LEMi ORHAN ERGiN
/lemiorhan
lemiorhanergin.com
@lemiorhan

Waste Driven Development - Agile Coaching Serbia Meetup

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