Rules vs Examples (BDDX London 2014)

Transcript

1. Stories, Rules and
   Examples
   @mattwynne | BDDX 2014 London
   

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2. Rules vs Examples
   AKA, The Passwords Game
   

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3. Form teams
   • Need an even number of teams
   
   • 2-4 people per team
   

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4. In order to prevent passwords
   from being guessed,
   Users must be forced to create
   strong passwords
   

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5. Create 3 rules
   • In your team, invent 3 rules for what makes a
   valid password
   
   • Keep the rules secret from the other teams
   
   • Be imaginative, and have a bit of fun
   
   • Examples:
   
   "It must have an @ in it"
   
   "It must not be the name of a fruit"
   
   

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6. Create 3 examples
   • Create 3 examples that illustrate your
   rules.
   
   • Scribble each one on a post-it note
   
   • Examples:
   "@pple"
   => valid
   "apple"
   => invalid
   "tom@to"
   => valid
   

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7. Guess the rules!
   • Pass your examples to another team.
   
   • Let them try to work out what your rules
   might be.
   

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8. Clarify with examples
   • As a guessing team, you can create new
   examples and ask them to be checked by
   the team whose rules you're trying to
   guess.
   
   • One example at a time.
   
   • How many examples will it take to guess
   the rules correctly?
   

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9. So...
   

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10. What was missing?
    

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11. Complete the following
    sentences
    • Examples are better than rules because…
    
    • Rules are better than examples because…
    
    • Examples without rules are like…
    
    • Rules without examples are like…
    

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12. We need rules and
    examples
    

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13. Use examples to
    illustrate the rules
    

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14. User Story
    Rules /
    Acceptance
    Criteria
    Examples
    Describe each
    of these in
    your own
    words
    

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