PRINCIPLES ON USABILITY PETER GULLBERG VP TECHNOLOGY STRATEGY

UsabilityONE DEFINITION OF USABILITY…

“When you conveniently can use a product or service and it meets your

expectations.”

Human performance and abilitiesWHAT NEED TO BE CONSIDERED IN USABILITY

Readability

Human memory

Vision

DesignLearnability

#1) Bailey (Human Performance), #2) NASA – On the typography of flightdeck communication

Ergonomics

Visceral design - first see feeling

Behavioural design - the feeling of using the device

Reflective design - what the design communicates

DesignWHAT HAS DESIGN GOT TO DO WITH USABILITY?

Don Norman, the authority in User Interfaces

Affordance is the cues (knowledge in the world) that something signals.

Insert here

Logotype – access to my bank

Clear and instructive display

Understandable legends

Numerical keys clearly separated

Understandable buttons

Screw on battery lid tells customer - ”Yes, can be opened, but only when needed”

Perceiving the worldAFFORDANCE

Learnability is achieved by

• Symmetry in functions (routine cognitive skills)

• Visual cues (knowledge in the world)

• Feedback, Information and Decision

• Fit users mental model (knowledge in the head)

• Repeated use

LearnabilityLEARNABILITY IS IMPORTANT

A+B=110 A is 100 more than B. What is B?

Knowledge in the headTHINGS CAN APPEAR EASY……

A+B=110 A is 100 more than B. What is B?

B=5

Knowledge in the headTHINGS CAN APPEAR EASY……

Knowledge in the worldADDING CONTEXT

Increased awareness Increased cognitive

processing for the relevant details

Increased usability Understandable function Increased intent (more

secure).

Amount: 1,234.00

Knowledge in the worldTHE 10 EURO NOTE

But, what’s on the frontside?

Knowledge in the worldTHE 10 EURO NOTE

But, what’s on the frontside?

ECB Presidentsignature

Microprint

Euro flag

Hypotethicaldoorwayarchitecture

The see throughsplit ”10”

Perceiving the world?SOME THINGS ARE JUST HARDWIRED…..

Can you spot the difference?

Perceiving the world?SOME THINGS ARE JUST HARDWIRED…..

Can you spot the difference?

Search and explore is how people learn new complex things and products.

Example is the remote control, do tightrope walking or your new iPod etc.

Would you dare do tightrope walking?

Exploring the WorldSEARCH AND EXPLORE

People are afraid of loosing - by human design

When that happens - search and explore stops

Same line, just different location - still same answer?

The same goes for PIN…

Exploring the WorldWHEN DO SEARCH AND EXPLORE STOP?

Design is important, wrong cues will cause problems

And Security have to be balanced with usability

Usability and Security have opposing value, and need to be balanced

DesignDESIGN IS IMPORTANT

TrustTRUST IS THE RESULT OF A USABLE PRODUCT

T=r+dTrust = reliability + delight

Trust comes from meeting and

beating customer expectations.

What is usability?USABILITY IS ABOUT MAKING THINGS EASY AND UNDERSTANDABLE FOR

THE USER

Progressive DisclosureFOCUS ON RELEVANCE

Progressive DisclosureFOCUS ON RELEVANCE

What is usability?SUCCESS CRITERIA’S FOR A SECURITY SOLUTION

• User friendly• Logical functionality• Reason of usage• No cryptic texts • I-follow-you• Context support• Portability.

Books I would recommendGOOD LITTERATURE FOR PRODUCT MANAGERS AND USABILITY SPECIALISTS

Emotional Design – Don NormanPredictably Irrrational – Dan ArielyThe design of everyday things – Don NormanHuman Performance Engineering - Bailey

THANK YOU FOR YOUR ATTENTION