Fighting with Waste Driven Development - XP Days Ukraine 2017

Lean Thinking for
Software Developers
LEMi ORHAN ERGiN
agile software craftsman @ iyzico
WASTE DRIVEN
DEVELOPMENT
FIGHTING WITH
manager
developer
the product guy
developer
@lemiorhan

/lemiorhan
lemiorhanergin.com
@lemiorhan
LEMi ORHAN ERGiN
ex-Sony, ex-eBay
founder of Turkish Software  
Craftsmanship Community

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
legacy code

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 complexity
WASTE

Let’s
find waste
and eliminate
in software development

searching for the missing single quote?

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

debugging
bug fixing
manual deployments
manual testing
unmerged branches
big upfront design
comments
LOGGING
framework addiction
highly coupled design
bıg RELEASES
COMMIT MESSAGES & GRAPH HAVING SILOSpackage organization

debugging
bug fixing
manual deployments
manual testing
unmerged branches
big upfront design
comments
LOGGING
framework addiction
highly coupled design
bıg RELEASES
HAVING SILOSpackage organization
COMMIT MESSAGES & GRAPH

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

follow the BOY SCOUT RULE
CUREPay technical debt
need a CULTURAL SHIFT

Pay technical debt
Define technical debts regularly and put to backlog
Fix bugs and do refactorings at every sprint
100 percent feature development kills your project
Batman & Robin might save your life

Pay technical debt
Teach your values and principles to the team
Slow down to go fast
It's your profession, do it well!

Pay technical debt
it defines a culture and a discipline
it is based on code review, refactoring and kaizen
it improves collective ownership and triggers collaboration
it is an antidote for dissolving silos.
it is a strategy for continuously eliminating waste

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
Feeling like a newbie while using a SCM
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
Feeling like a newbie while using a SCM
Manual testing again and againAutomated tests in all levels
Calculate defect resolution times
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
Learn Git (or any other you use) perfectly
think differently

LET PEOPLE THINK differently
Brainstorming Sessions about
standards, architecture and technical debt
Grand Retrospectives

LET PEOPLE do differently
TDD Radori Sessions Coding Dojos Code Retreats

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

LEMi ORHAN ERGiN
Feedback: bit.ly/lemiorhan
thank you all!

Fighting with Waste Driven Development - XP Days Ukraine 2017

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