Exam2

6b-Design Rules §

• Goal: Max usability
• Direction: Standardsand Guidelines
• Detail: Golden Rules

Principle: abstract, low authority and generality
STandards: specific design rules, high auth limited application
Guidelines: low auth, morw gener app

Prnciples to Support Usability §

• Learnability

• Predicatable

• Synthesiable

• Familiar

• Generalize

• Consistency

• Flexibility

• Diaalog Initiative

• Multi Thrreading

• Task Migratability

• Substitution

• Customizability

• Robustness

• Observability

• Recover

• Responsiveness

• Task Conformance

Standards §

Guidelines §

• Suggestive

• Textbooks

Golden Rules §

• Useful Checklist
• better than nothing
• Shneiderman 8 Golden Rules:
  1.  Strive for consistency
  Consistent interfaces make it easier for users to learn and remember how to use an interface.
  2.  Enable frequent users to use shortcuts
  Providing shortcuts can save time and effort for experienced users.
  3.  Offer informative feedback
  Users should receive clear and prompt feedback on their actions and the system’s response.   
  4.  Design dialogues to yield closure
  Dialogues should be designed to have a clear beginning, middle, and end, so users feel like they have completed a task.
  5.  Offer simple error handling
  Error messages should be clear, concise, and offer constructive solutions.
  6.  Permit easy reversal of actions
  Users should be able to undo an action if they make a mistake.
  7.  Support internal locus of control
  Users should feel like they are in control of the system, not the other way around.
  8.  Reduce short-term memory load
  Users should not have to remember information from one part of the interface to another. Instead, information should be presented in a clear, consistent, and organized manner.
• Norman’s 7 Principle

  1. Use Knowledge in World and Mind

  2. Simplify the structure of tasks

  3. Make things visible

  4. Get mappings right

  5. Explocit the power of constraints, natural and artificial

  6. design for error

  7. when all else fails, standardize

7-Advanced Topics §

Universal §

• Meaning:
  • The process of design products canbe used by
    • as many people
    • as many situation
• Principle

  • Equitable Use

    • appealing to all
    • Everyone as same one

  • Flexibility Use

    • Allow for a range of ability andpreference

  • Simple and intuitive

    • support user’s expect and accommodate diff lang

  • not complex

  • facilitate access to important

  • provice prompt and feedback

  • Perceptible info

  • proveide effect communication of info regard env condition or the user;s ability

  • Tolerance of error

  • Low Physical Effort

  • Comfortable to use, min physical effort and fatigue

  • Size & Space for approch and use

Socio-org issues and Stakeholder requirements §

• Why
  • Prople in group have conflict goal
• How

  1. Identify Stakeholders

  2. consider requirements and design for every stakeholder

Capture Requirement §