How to Build the Perfect 

Pattern Library
Wolf Brüning – UXCampEurope 2014
About me
@wolfbruening
produktbezogen.de
I am Senior Interaction Designer at: I write on UX design and product management ...
About OTTO.de
• 2nd largest ecommerce
site in Germany
• 1.7+ billion € revenue
• 1.5+ million daily visits
• Millions of i...
Flashback!
Two years ago: no pattern library
There were 8 solutions for product recommendation cinemas on OTTO.de at the same time! E...
Problem 1: Working out of sync
In large organizations it is difficult to completely synchronize all designers and product ...
Problem 2: Misunderstandings
Misunderstandings in the communication between design and development create more inconsisten...
Problem 3: Duplicate work
Even if there would be perfect synchronization and no misunderstandings there would still be dup...
Working without design patterns
• Almost certainly will create inconsistent interfaces
• Leads to misunderstandings
• Lead...
What is a design pattern?
Design pattern definition
A design pattern is an element of an user interface that
solves a specific design problem and repe...
Design patterns examples
• Atomic patterns: „bricks“
• Patterns of patterns: „components“
Design patterns examples
Templates and sub-templates
Atomic Design
patternlab.io
A comparable classification by Brad Frost
Design patterns examples
Flows
Design patterns examples
Animations and transitions
Meaningful Transitions
Johannes Tonollo
Design patterns examples
• Naming conventions
• Visual Design: Style Tiles
Our path to the
perfect pattern library
First try: By the books
„A typical pattern describes the problem, the
chosen solution, the rationale behind that solution,
related patterns that t...
Yahoo Pattern Library
First mock-up
Working like this was tedious
and cost a lot of time
Yahoo Pattern Library
Yahoo Pattern Library
WTF?
Yahoo Pattern Library process
http://boxesandarrows.com/implementing-a-pattern-library-in-the-real-world-a-yahoo-case-stud...
Old school pattern libraries
• Too much overhead for documentation and processes
• Operation will cost more time than save...
Key learnings
1. For pattern libraries being up to date is more
important than anything else.
2. Overhead is the enemy of ...
Second try: Let’s get modular
Back to the drawing board
• But in a big corporation you still have lots of people
and roles involved:
• Interaction Desig...
Our solution
A modular pattern library for our three main use cases
• Documentation and communication (long term)
• Discov...
Module 1: Documentation
• Closest to a traditional
pattern library
• Only documentation
that is really necessary
• Should ...
Module 2: Discovery & Design
Good overview and quick access to all patterns: PSDs
Module 3: Development
Live preview and quick access to the code of a pattern:
„Code Pattern Library“ inspired by Twitter B...
Learning: Involve your developers
• Designers AND developers will benefit from a good
pattern library
• It will improve the...
Modular structure
Documentation
Communication
(Brand Experience Guide)
Code
Layer-Name Pattern-Name Pattern-Name CSS-Class...
Modular structure
Documentation
Communication
(Brand Experience Guide)
Code
Layer-Name Pattern-Name Pattern-Name CSS-Class...
Key learnings
• Keeping three modules in sync needs a lot of discipline,
especially if you work agile and your patterns st...
Third (and final) try:
Lean Pattern Library
Simplifying our structure
Documentation
Communication
(Brand Experience Guide)
Code
Layer-Name Pattern-Name Pattern-Name C...
Simplifying our structure
Code
Layer-Name Pattern-Name CSS-Classes
Discovery &
Design
(???)
Documentation,
Design & Develo...
Principles for a
lean pattern library
Lean processes & documentation
• A not-so-perfect pattern library is a lot better than a
perfectly documented but outdated...
Lean processes & documentation
• With most patterns we start with no documentation at all
• We only add documentation if p...
Documenting in code
• Provide an authentic look & feel
• You can inspect the behavior (to some extent)
• Support a closer ...
Documenting in code
• Our pattern library CSS is synchronous with otto.de
• CSS3 + Webfonts + Icon-Fonts, as few Images as...
Stability vs. change
We put up a set of rules that prevent patterns from being
too easily changed:
• Only add new patterns...
Stability vs. change
• Continuously experiment with new patterns
• Challenge existing patterns on a regular basis
!
• Find...
„A pattern library is like a compass. It’ll tell you
what direction you should go in, but it’s up to you
to figure out how ...
Naming Schema
Descriptive vs. semantic names
Shiny Blue Button Shiny Blue Button???
Use semantic names
• Pattern names should always refer to function, not
visual appearance or context
!
• Primary Button
• ...
Naming variants
Button S
Button M
Button L
???
T-shirt sizes might work for smaller
projects. But with lots of variants yo...
US city block numbering
House numbers increase by 100 every block regardless of the number of buildings. This is great for...
City block sizes
button50
button100
button200
button150
City block sizes
• The standard variant of the pattern gets the „100“
• Smaller variants get „75“, „50“, „25“...
• Larger ...
City block sizes
slide200
slide100red100
red200
warmGrey100
warmGrey200
So why use a pattern library?
Patterns improve your UX
• Provide a consistent and predictable UI
• Let you prototype and iterate faster
• Save you time ...
Patterns improve your code
• Speed up implementation
• Prevent code redundancies
• Simplify QA
• Simplify visual redesigns
Patterns improve your team
performance
• Save everybody time
• Create a shared understanding for UI elements
• Prevent mis...
This sounds really cool, but...
!
!
...don‘t patterns limit my creativity?
You’re wrong!
„The use of a pattern library helps designers quickly
craft parts of a design so the bulk of their time is
spent designing...
Pattern libraries can do more
Change the way you work
In a traditional process, the interaction designer creates a concept and prototypes hands them ove...
Change the way you work
With patterns the IxD is able to hand over the prototype directly to the developer who – after the...
Enable responsive design
Product
Top-D
ow
n
Bottom
-U
p
Abstract
Concrete
Grid & Breakpoints
Content Reference Wireframes
...
„We’re not designing pages anymore. We’re
designing systems of components.“
Stephen Hay
Design and development strategist
Great examples
Mailchimp Pattern Library
ux.mailchimp.com/patterns
Lonely Planet Styleguide
rizzo.lonelyplanet.com/stylegu...
If you want to build a pattern library
• Start lean, stay lean
• Designers involve your devs, developers involve your
desi...
Thank you!
tl;dr Pattern libraries are awesome!
If you want to learn more… 

(in German)
If you always
wanted to...
• do design, testing or research for a billion-euro-revenue-ecommerce site
and make millions of...
Image reference
• Slide 25: Matt Leacock

http://boxesandarrows.com/implementing-a-pattern-
library-in-the-real-world-a-ya...
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How to build the perfect pattern library

  1. 1. How to Build the Perfect 
 Pattern Library Wolf Brüning – UXCampEurope 2014
  2. 2. About me @wolfbruening produktbezogen.de I am Senior Interaction Designer at: I write on UX design and product management for the blog:
  3. 3. About OTTO.de • 2nd largest ecommerce site in Germany • 1.7+ billion € revenue • 1.5+ million daily visits • Millions of items ranging from swimwear to chainsaws • Relaunch with pattern library last October
  4. 4. Flashback!
  5. 5. Two years ago: no pattern library There were 8 solutions for product recommendation cinemas on OTTO.de at the same time! Each with different design, different behaviors and different code.
  6. 6. Problem 1: Working out of sync In large organizations it is difficult to completely synchronize all designers and product teams. Different solutions are built for the same design problem. (This will also happen in smaller organizations on the long run.)
  7. 7. Problem 2: Misunderstandings Misunderstandings in the communication between design and development create more inconsistencies.
  8. 8. Problem 3: Duplicate work Even if there would be perfect synchronization and no misunderstandings there would still be duplicate work.
  9. 9. Working without design patterns • Almost certainly will create inconsistent interfaces • Leads to misunderstandings • Leads to lots of extra work and QA
  10. 10. What is a design pattern?
  11. 11. Design pattern definition A design pattern is an element of an user interface that solves a specific design problem and repeats across the product in various contexts and/or with various content. Perfect example: a button
  12. 12. Design patterns examples • Atomic patterns: „bricks“ • Patterns of patterns: „components“
  13. 13. Design patterns examples Templates and sub-templates
  14. 14. Atomic Design patternlab.io A comparable classification by Brad Frost
  15. 15. Design patterns examples Flows
  16. 16. Design patterns examples Animations and transitions Meaningful Transitions Johannes Tonollo
  17. 17. Design patterns examples • Naming conventions • Visual Design: Style Tiles
  18. 18. Our path to the perfect pattern library
  19. 19. First try: By the books
  20. 20. „A typical pattern describes the problem, the chosen solution, the rationale behind that solution, related patterns that the designer should be aware of, and the results of usability testing.“ Jared Spool Founding Principal of UIE
  21. 21. Yahoo Pattern Library
  22. 22. First mock-up Working like this was tedious and cost a lot of time
  23. 23. Yahoo Pattern Library
  24. 24. Yahoo Pattern Library WTF?
  25. 25. Yahoo Pattern Library process http://boxesandarrows.com/implementing-a-pattern-library-in-the-real-world-a-yahoo-case-study/
  26. 26. Old school pattern libraries • Too much overhead for documentation and processes • Operation will cost more time than save time • High probability of becoming obsolete
  27. 27. Key learnings 1. For pattern libraries being up to date is more important than anything else. 2. Overhead is the enemy of up-to-dateness. ! ➡ We needed a leaner approach
  28. 28. Second try: Let’s get modular
  29. 29. Back to the drawing board • But in a big corporation you still have lots of people and roles involved: • Interaction Designers • Visual Designers • User Experience Managers • Product Managers • Developers • QA • Project Managers • Corporate Design • External Agencies • Subsidiary Companies • … • A big one-size-fits-all solution is too cumbersome
  30. 30. Our solution A modular pattern library for our three main use cases • Documentation and communication (long term) • Discovery and design • Development
  31. 31. Module 1: Documentation • Closest to a traditional pattern library • Only documentation that is really necessary • Should use an existing tool
  32. 32. Module 2: Discovery & Design Good overview and quick access to all patterns: PSDs
  33. 33. Module 3: Development Live preview and quick access to the code of a pattern: „Code Pattern Library“ inspired by Twitter Bootstrap
  34. 34. Learning: Involve your developers • Designers AND developers will benefit from a good pattern library • It will improve the relationship between the two roles
  35. 35. Modular structure Documentation Communication (Brand Experience Guide) Code Layer-Name Pattern-Name Pattern-Name CSS-Classes Discovery & Design (PSD-Files) Development (Code Pattern Library)
  36. 36. Modular structure Documentation Communication (Brand Experience Guide) Code Layer-Name Pattern-Name Pattern-Name CSS-Classes Discovery & Design (PSD-Files) Development (Code Pattern Library)
  37. 37. Key learnings • Keeping three modules in sync needs a lot of discipline, especially if you work agile and your patterns still evolve • Documenting patterns as images gets extremely cumbersome with components (patterns of patterns) • Giant PSD-files kill photoshop • Everybody, even designers, loved the Code Pattern Library ! ➡ We were still not lean enough
  38. 38. Third (and final) try: Lean Pattern Library
  39. 39. Simplifying our structure Documentation Communication (Brand Experience Guide) Code Layer-Name Pattern-Name Pattern-Name CSS-Classes Discovery & Design (PSD-Files) Development (Code Pattern Library) We stopped using the PSDs (and maybe photoshop at all) and moved the documentation to the code pattern library.
  40. 40. Simplifying our structure Code Layer-Name Pattern-Name CSS-Classes Discovery & Design (???) Documentation, Design & Development (Code Pattern Library) Brand- Communication (Brand Experience Guide) Only a subset of stable and brand relevant patterns is moved to the brand experience guide.
  41. 41. Principles for a lean pattern library
  42. 42. Lean processes & documentation • A not-so-perfect pattern library is a lot better than a perfectly documented but outdated one • Try to keep pattern definitions as scarce as possible and processes and discussions lean • Work overhead for adding and managing patterns should be as low as possible • If maintaining a pattern library saves more time than it costs, everyone will be motivated to keep it up to date • This is the most important factor for a successful implementation
  43. 43. Lean processes & documentation • With most patterns we start with no documentation at all • We only add documentation if problems pop up with understanding the pattern • One designer and one developer as „pattern masters“ create and manage our patterns
  44. 44. Documenting in code • Provide an authentic look & feel • You can inspect the behavior (to some extent) • Support a closer collaboration between designers and developers • No need to update components when one of its sub- patterns is changed ! • Be careful if there are users with legacy browsers
  45. 45. Documenting in code • Our pattern library CSS is synchronous with otto.de • CSS3 + Webfonts + Icon-Fonts, as few Images as possible • Flexible and easy to update • Future proof: High resolution friendly, responsive design friendly • No hacks for maintaining a similar look on legacy browsers (but has to work) • Outer margins are not part of the pattern (prevent unnecessary variants)
  46. 46. Stability vs. change We put up a set of rules that prevent patterns from being too easily changed: • Only add new patterns if existing patterns don’t provide a satisfactory solution • Change pattern if a new pattern becomes standard in the market • Chance pattern if a new pattern beats it in user- or a/b-testing
  47. 47. Stability vs. change • Continuously experiment with new patterns • Challenge existing patterns on a regular basis ! • Find a good balance between stability and change. Don’t be a pattern nazi
  48. 48. „A pattern library is like a compass. It’ll tell you what direction you should go in, but it’s up to you to figure out how to get there.“ Lucas Pettinati UX Lead, Google Apps
  49. 49. Naming Schema
  50. 50. Descriptive vs. semantic names Shiny Blue Button Shiny Blue Button???
  51. 51. Use semantic names • Pattern names should always refer to function, not visual appearance or context ! • Primary Button • Secondary Button • Headline • Copy • Navigation-List
  52. 52. Naming variants Button S Button M Button L ??? T-shirt sizes might work for smaller projects. But with lots of variants you can’t add variants in between.
  53. 53. US city block numbering House numbers increase by 100 every block regardless of the number of buildings. This is great for orientation but also very flexible for adding new houses between existing ones.
  54. 54. City block sizes button50 button100 button200 button150
  55. 55. City block sizes • The standard variant of the pattern gets the „100“ • Smaller variants get „75“, „50“, „25“... • Larger variants get „200“, „300“… • Numbers don’t resemble exact size rations (i.e. button200 is not necessary twice as large as button100) because that would be descriptive naming ! ➡ Now you have a flexible naming system where it‘s easy to identify if a pattern is standard or larger or smaller
  56. 56. City block sizes slide200 slide100red100 red200 warmGrey100 warmGrey200
  57. 57. So why use a pattern library?
  58. 58. Patterns improve your UX • Provide a consistent and predictable UI • Let you prototype and iterate faster • Save you time to work on new problems or the details of your product • „Dark corners“ of your product benefit from patterns that have been tested elsewhere
  59. 59. Patterns improve your code • Speed up implementation • Prevent code redundancies • Simplify QA • Simplify visual redesigns
  60. 60. Patterns improve your team performance • Save everybody time • Create a shared understanding for UI elements • Prevent misunderstandings • Reduce complexity so you can tackle harder problems • Help you onboard new team members
  61. 61. This sounds really cool, but... ! ! ...don‘t patterns limit my creativity?
  62. 62. You’re wrong!
  63. 63. „The use of a pattern library helps designers quickly craft parts of a design so the bulk of their time is spent designing what‘s unique, rather than what‘s common.“ Lucas Pettinati UX Lead, Google Apps Patterns support your creativity!
  64. 64. Pattern libraries can do more
  65. 65. Change the way you work In a traditional process, the interaction designer creates a concept and prototypes hands them over to the visual designer who does the final design and briefs the developer.
  66. 66. Change the way you work With patterns the IxD is able to hand over the prototype directly to the developer who – after the coding is done – pairs up with the visual designer to fine tune the design directly on the website. There is no need to paint a picture of your website in photoshop anymore.
  67. 67. Enable responsive design Product Top-D ow n Bottom -U p Abstract Concrete Grid & Breakpoints Content Reference Wireframes Layout Responsive Patterns: Bricks Responisve Patterns: Components
  68. 68. „We’re not designing pages anymore. We’re designing systems of components.“ Stephen Hay Design and development strategist
  69. 69. Great examples Mailchimp Pattern Library ux.mailchimp.com/patterns Lonely Planet Styleguide rizzo.lonelyplanet.com/styleguide
  70. 70. If you want to build a pattern library • Start lean, stay lean • Designers involve your devs, developers involve your designers • Use live code, as few images as possible • Use semantic and flexible pattern names • Find a balance of stability and change • Test, learn, adapt
  71. 71. Thank you! tl;dr Pattern libraries are awesome!
  72. 72. If you want to learn more… 
 (in German)
  73. 73. If you always wanted to... • do design, testing or research for a billion-euro-revenue-ecommerce site and make millions of users happy • work in a highly professional (and fun) team of 16 user experience, interaction design and visual design experts • make use of our own testing-lab • live and work in Germany‘s most beautiful city ;o) is searching for IxD and UX folks. Talk to us!
  74. 74. Image reference • Slide 25: Matt Leacock
 http://boxesandarrows.com/implementing-a-pattern- library-in-the-real-world-a-yahoo-case-study/ • Slide 53: Margaret Almon 
 http://www.flickr.com/photos/nutmegdesigns

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