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Sherlock Holmes
And
Pairing
www.mozaicworks.com
Me
Adi Bolboacă
Programmer
Organizational & Technical
Trainer & Coach www.mozaicworks.com
Pairing. Why. When.
Do you pair?
Why do you pair?
How often?
www.mozaicworks.com
Pairing roles
Driver
Navigator
www.mozaicworks.com
Driver
Takes the decisions
Consults with the Navigator
Focuses on short term actions
Verbalizes all the performed actions
www.mozaicworks.com
Navigator
Looks ahead for strategy
Annoyingly rechecks the facts of the Driver
Asks meaningful questions
Verbalizes agreement or disagreement
Does not cross the Driver's comfort zone
www.mozaicworks.com
Holmes & Watson pairing
www.mozaicworks.com
Holmes driving: action
“Holmes took his revolver from his drawer 
and slipped it in his pocket.  It was clear 
that he thought that our night's work 
might be a serious one.”
Sherlock Holmes
www.mozaicworks.com
Holmes driving: data
“Data! Data! Data!” he cried impatiently. 
“I can't make bricks without clay.”
“There is nothing more deceptive than an 
obvious fact.”
Sherlock Holmes
www.mozaicworks.com
Watson being a Navigator
“If I irritated him by a certain methodical 
slowness in my mentality, that irritation 
served only to make his own flame­like 
intuitions and impressions flash up the 
more vividly and swiftly”
Dr. Watson
www.mozaicworks.com
Watson navigating: Facts
The navigator remembers facts to the driver
The navigator supports driver's decisions
The navigator needs to see options ahead
Processing data is hard for navigation
www.mozaicworks.com
Holmes & Watson: Learning
“Education never ends, Watson. It is a 
series of lessons, with the greatest for the 
last.”
Sherlock Holmes
"I have not lived for years with Sherlock 
Holmes for nothing."
Dr. Watson
www.mozaicworks.com
Holmes & Watson: Recap
www.mozaicworks.com
Holmes & Watson: Recap
Drive or Navigate
Observe well. Verbalize.
Give meaningful suggestions
Being a navigator is hard
Pairing is learning
www.mozaicworks.com
Some pairing ideas
Pair-programming (with testers also)
Pair-facilitation
Pair-talking
Pair-writing (collective text ownership)
www.mozaicworks.com
Pair-programming
www.mozaicworks.com
Pair-programming
Can be done anywhere: office, pub, etc
Change roles/keyboard very often
Outcomes: learning, better products
Fastest feedback cycle in Agile
Can be difficult
www.mozaicworks.com
Pair-programming: Navigator
Adi tells story of Ron Jeffries being a
navigator
www.mozaicworks.com
Pair-facilitation
Can be done by anyone
Just ask someone to pair when facilitating
Outcome: learn better your skills
Outcome: be a better listener
Outcome: simplify&clarify your explanations
www.mozaicworks.com
Pair-talking
Fast feedback on content
Outcome: the talk has better content
Outcome: learn a lot from your pair
Outcome: you learn more from audience
www.mozaicworks.com
Pair-writing
www.mozaicworks.com
Pair-writing
Easier to start writing
The book can be finished faster
Fast feedback on content
Learning opportunity from your pair
www.mozaicworks.com
Pairing
Did I inspire you to pair?
What other ideas for paring do you have?
When would you start paring?
www.mozaicworks.com
Contact me
Unit testing workshop
Remote pair-programming
TDD workshop
Refactoring workshop
Legacy code workshop
Legacy code retreat
Code retreat
@adibolb
www.mozaicworks.com
http://www.mozaicworks.com
adrian.bolboaca@mozaicworks.com
@adibolb
Extend your mentoring & training
capacity
Accelerate learning through
communities of practice
Grow your functional leaders and top
talents
www.mozaicworks.com
Thank you!
The slides will be available on
Slideshare&Twitter
Questions?
www.mozaicworks.com
Images
http://img.thesun.co.uk/aidemitlum/archive/01090/SNF2301TVCC-380_1090987a.jpg
http://en.wikipedia.org/wiki/File:Paget_holmes.png
http://seanbanville.com/wp-content/uploads/2010/04/writing.jpg
http://agile2012.agilealliance.org/files/5113/3529/2537/Ron_Jeffries-nobull.jpg
www.mozaicworks.com

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Sherlock Holmes and Pairing @Wlidcard Conference 2013 09 13