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Rules vs Examples (BDDX London 2014)

December 05, 2014

Rules vs Examples (BDDX London 2014)


December 05, 2014

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  1. Stories, Rules and
    @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

    • Scribble each one on a post-it note

    • Examples:
    => valid
    => invalid
    => 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

    • 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
    • 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

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  13. Use examples to
    illustrate the rules

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  14. User Story
    Rules /
    Describe each
    of these in
    your own

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