Two dimensions of design rules
Authority (Must be followed or its just a suggestion) and Generality (can be applied to many design situations or in some particular situation)
Standarts (two dimensions)
+authority -generality
Generality (two dimensions)
-authority +generality
Greater generality means less probability of conflict
F
What is ISO 9241?
Its a standard for usability specification
Standards
– Set by national or international institutions to ensure
compliance with a set of design rules by a large
community (uniformity, compatibility).
– Requires consistent underlying theory (stable).
– Hardware/software standards.
– High authority.
Nothing! Just write it from memory
ISO 9241 – usability specification
– Usability: The effectiveness, efficiency and satisfaction with
which specified users achieve specified goals in particular
environments.
* Effectiveness:
– Accuracy and completeness with which specified users achieve
specified goals in particular environments.
* Efficiency :
– The resources expended in relation to the accuracy and
completeness of goals achieved.
* Satisfaction:
– Comfort and acceptability of the work system to its users and
other people affected by its use.
Nothing! Just write it from memory
- Guidelines
– Suggestive and more general
– Several books and technical reports contain huge
catalogues of guidelines. - Ex: Apple human interface guidelines
https://developer.apple.com/design/
Nothing! Just write it from memory
Guidelines
- Guidelines
– Suggestive and more general
– Several books and technical reports contain huge
catalogues of guidelines. - Ex: Apple human interface guidelines
https://developer.apple.com/design/
Standards
Standards
– Set by national or international institutions to ensure
compliance with a set of design rules by a large
community (uniformity, compatibility).
– Requires consistent underlying theory (stable).
– Hardware/software standards.
– High authority.
Using no design rules is better than using them
False
3 design rules collections
-Nielsen’s 10 Heuristics (addressed later)
– Shneiderman’s 8 Golden Rules
– Norman’s 7 Principles
HCI Design patterns
- An approach to reusing knowledge about successful
design solutions - A pattern is an invariant solution to a recurrent problem
within a specific context.
Examples
– Light on Two Sides of Every Room (architecture)
– A wizard breaks a task down into a linear sequence of steps,
often presented as a sequence of dialog boxes.
– Go back to a safe place; center stage pattern (HCI)
– Martijn van Welie, http://www.welie.com/patterns
HCI design patterns
An approach to reusing knowledge about successful
design solutions
* A pattern is an invariant solution to a recurrent problem
within a specific context.
* Examples
– Light on Two Sides of Every Room (architecture)
– A wizard breaks a task down into a linear sequence of steps,
often presented as a sequence of dialog boxes.
– Go back to a safe place; center stage pattern (HCI)
– Martijn van Welie, http://www.welie.com/patterns
Nothing! Just write it from memory
