PairProgramming is like SEX
Yves Hanoulle
PairCoaching.net
www.PairCoaching.net

Me.About ()
Yves Hanoulle
Project Coach
Training, Coaching & Consultancy Services
on agile & Team practices
in EMEA.
Certified Core Trainer
Partner of Els Ryssen
Father of Joppe 2002, Bent 2004, Geike 2007

You.About()
 Who are you?
 What makes you different?
 What do you know about agile?
 Other info you like to share?
 What would be the successful
outcome of this course for you?

PairProgramming what is it?
What is
this
Russian
thinking
?

Driver - Navigator

Experience

one team

Pair Programming

Pair Programming
Fun learning
Quality
Fast
Spread knowledge

Some people can’t do it

Some people can’t do it... II

Some people can’t do it... III

Truck Number...

Isn’t it waste?

Why would two people do the job of one? I

Why would two people do the job of one? II

Why would two people do the job of one? III

Why would two people do the job of one? IV

Why would two people do the job of one? V

Why would two people do the job of one? VI

Why would two people do the job of one? VII
 STuBru: Wim Oosterlinck &
Samson & Gert

Why would two people do the job of one? VIII

Why would two people do the job of one? IX

Why would two people do the job of one? X

Why would two people do the job of one? XI

A junior developer will slow down senior developer

The power of the junior

My cost will double I

My Costs will double II

My cost will double III
“IBM reported spending about $250
million repairing and reinstalling
fixes to 30,000 customer-reported
problems. That is over $8,000 for
each defect!”
-“A Discipline for Software
Engineering”, 1995, Humphrey,
W.S.

Points of resistance

Small work area

Strong Code Ownership

Inconsistent workstation setup

People don’t care

Everyone settles into their own “Comfort Zone” over time

Why does it work?
 Continuous Review
 Less Defects / Defects caught early
 Design Quality
 Problem Solving
 Economical
 “pair-pressure” ensures timely delivery

Why does it work II
 Learning, Induction of new team members, saves effort on
intra-team
 documentation
 Less distractions / Higher productivity
 Satisfaction
 Team Building and Communication

PingPong Programming

Keyboard and Mice Pairing

Pairing Station I

Pairing Station II
 Promiscue pairing

Pairing Rotation

Distributed PairProgramming

Promiscue pairing

Pomodore Technique

Ask 4 help

Pairing Smells

Distracted Pair

No pair rotation

Manager decides the pair

Selective Pairing

Test Driven Design
Write a Test
RED
It fails

Test Driven Design
Implement the code
GREEN
It works!
YES!

Test Driven Design
Write a Test
RED
It fails

Test Driven Design
Implement the code
GREEN
It works!
YES!

Url’s
 http://www.slideshare.net/nashjain/pair-programming
 http://nat.truemesh.com/stairmaster.html#
 http://www.mitchlacey.com/docs/XR4PromiscuousPairingandBeginnersMi
nd.pdf
 http://collaboration.csc.ncsu.edu/laurie/Papers/Kindergarten.PDF
 http://www.britannica.com/bps/additionalcontent/18/34706583/Pair-Programming-
as-a-Modern-Method-of-Teaching-Computer-Science
 http://www.pomodorotechnique.com/
 The Core Protocols http://alturl.com/b9fn
 The Costs and Benefits of Pair Programming (Laurie Williams & Alistair Cockburn)
 Strengthening the Case for Pair-Programming (- Laurie Williams, Robert R. Kessler,
Ward Cunningham & Ron Jeffries)
 On the Economic Feasibility of Pair Programming (Hakan Erdogmus & Laurie
Williams )
 http://www.netobjectives.com/ap/download/pairing.pdf

Sources
http://www.librarything.com/catalog.php?view=YvesHanoulle

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 Web: http://www.PairCoaching.net
 Blog: http://PairCoaching.wordpress.com
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 Books:
http://www.librarything.com/catalog.php?view=YvesHanoulle
 Mail : FirstName at Paircoaching dot net
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 Skype: YvesHanoulle

PairCoaching.net the way to leading greatness
Thank you !!