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CIS 764 Database Systems Engineering. L14: Usability - Part 2 : examples, About Presentations (beginning slides are copied from L6a). CIS 764 Database Systems Engineering. Usability …

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cis 764 database systems engineering
CIS 764 Database Systems Engineering

L14: Usability - Part 2 : examples,

About Presentations

(beginning slides are copied from L6a)

http://www.cis.ksu.edu

cis 764 database systems engineering1
CIS 764 Database Systems Engineering

Usability …

a measure (a ranking or quantitative assessment)

of user satisfaction and performance

in using an interface (web, application UI, or service API) 

for an application or service.

“good”, “nice” are not measures !

“number of ..”, time, Likert scale… are measures.

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

includes:

function (functionality)    ... the use-cases ,        appearance           ........... the "look and feel",                                                        ( readable, simple:  7+-2 )      operation  ........................ the required behavior of the user

and the behavior of the application

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Why important?

1.  usability will dominate the success/rejection of the application.

2.  presentation & usability team 

typically

UI design = same effort as model implementation !!       10% of UI design  == usability

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering
  • Refs:
  • Usability.gov  ... http://www.usability.gov/basics/
  • Nielson  Usabiltiy 101   http://www.useit.com/alertbox/20030825.html Nielson:  Ten Heuristics 
  • http://www.useit.com/papers/heuristic/heuristic_list.html more links  http://www.usableweb.com/
  • books
  • old The Design of Everyday Things,(Norman)
  • 2001 Homepage Usability: 50 Websites Deconstructed (Nielsen)
  • 2000 Designing Web Usability: The Practice of Simplicity (Nielsen)
    • current … $$$ for usability reports

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Your usability evaluations:

seeking e-commerce-like sites

(user interaction to a back-end DB)

seeking some bad site, some good site.

(many found both bad and good at same site)

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Amazon, Yahoo, Monster

Orkut (2), Digg.com

Google, Yahoo

Gmail, KSU webmail

NY Times, Manhattan Mercury, KSU Collegean

CIS540

HP(3), Dell (2), Sony, IBM(2), BEA, Microsoft, CircuitCity

Verizon

espnStar

ING

Stonybrook U

from India: rediff, indicthreads, naukri

KeyPoster, LongCycle, Durlston, ocgov

deal2buy, slickDeal, JustDeals

whattheboat, latex-project

dzinerHolidays

Chilpotle

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Good features:

layout .. simple

fast (simple)

easy

rich

personal

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Good features:

“good” organization / layout (5); standard layout (bbb);

organization by user roles;

Nielson’s features

fast (2):

no ads

easy navigation:

rich functions, drop down selection, good search (spelling);

tutorials;

rich functions:

dynamic update ( usually Ajax)

data mining … customer helps

personal profile

data mining … customer helps

multi-language … select non-english

auto-region detect …

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Bad features:

(layout) complex layout (4); complex lists of items;

color clash, icon visibility

(fast) big ads, blinking, clutter, many ads,

useless flash

(easy) long navigation,

numeric user id, multiple register

(rich) hides the cost (2),

no product reviews

missing feature (fwd email)

weak search; no search feature

(bad) bad links

not cross-browser

incomplete drop down list

security breach

not Nielson features

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Class web evaluation pages:

... No name (many)

… non-active links (text, but no link) … several

… no images ! …. few

vs too large images … many

vs bad link to image … few

… did not answer the question: “what good / bad feature” … few

… spelling errors … several

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering
  • Nielson 2000, Top ten mistakes:
  • Bad search
  • Pdf files
  • Color of visited links
  • Non-scannable text
  • Fixed size fonts
  • Weak page titles
  • Ads
  • Violating design patterns
  • Opening new windows
  • Not answering key questions (like price)
  • http://www.useit.com/alertbox/

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Bad features:

How can this be?

What is the answer?

Is the state of software quality any different

from the state usability?

Ans:

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Bad features:

How can this be?

* GUI design by programmers.

* Test / evaluation by the designers.

good for the business =/= good for user

natural difference in preferences

What is the answer?

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Bad features:

How can this be?

* GUI design by programmers.

* Test / evaluation by the designers.

What is the answer?

follow established standards

* (Nielson) visual prototypes

[if necessary, mock back-end data]

* user personas (and real users)

* patterns (of domains & interactions)

* usability testing labs

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering
  • Doc Searls :
  • used to sell many books
  • his site linked to Amazon for fulfillment.
  • changed site to link to Wordsworth for fulfillment
  • ….
  • sold zero single books !!
  • Why?

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering
  • Doc Searls :
  • used to sell many books
  • his site linked to Amazon for fulfillment.
  • changed site to link to Wordsworth for fulfillment
  • ….
  • sold zero single books !!
  • Why?
  • users do not want to learn any new interface
  • Wordsworth violated guidelines for ecommerce:
  • - bag vs cart
  • - “add to bag” gives no feedback
  • - cannot find the “checkout” link
  • (all these have been changed)

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Response times:

0.1 sec .. Interaction OK, no other feedback

1.0 sec .. Not direct interaction, but no other feedback

10 sec .. OK wait time with feedback

longer … user will multi-task to other windows.

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

GNOME Usability Guide 

http://developer.gnome.org/projects/gup/hig/2.0/       (could you find it from   http://developer.gnome.org/                                         or http://developer.gnome.org/projects/gup/

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Usability Testing    Wichita State Software Usability Research Laboratory

http://psychology.wichita.edu/surl/

example studies:  

10 mistakes of shopping carts: 

http://psychology.wichita.edu/surl/usabilitynews/42/shoppingcart.htm        about fonts  

http://psychology.wichita.edu/surl/usabilitynews/3S/font.htm        3 auto insurance sites 

http://psychology.wichita.edu/surl/usabilitynews/42/insurance.htm        image speed / compression 

http://psychology.wichita.edu/surl/usabilitynews/3S/download_time.htm

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

http://www.zenhaiku.com/archives/usability_applied_to_life.html

1 prevent errors: put items out the night before

2 consistency & standards: always put keys in right pocket

3 prevent errors: auto schedule key bills

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

About the class presentations:

Why?

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

About the class presentations:

Why?

Dimensions of “knowledge”

technical / concrete … coding

constructive / abstract … design

concept /abstract …. speaking / teaching

language …. writing

relational …. group work

… many more

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

About the class presentations:

Presentation Evaluation Form:

Name: ________________________________ Date:_______________

Topic:__________________________ ___________________________

Start: __________ Stop:___________ Time:____________________

Eye contact: Font Size:

Position: Colors:

Volume: References:

Confidence: 7+-2

UM’s, “you know”: Diagrams:

other: Concept:

negatives: Example:

Difficulty:

Response to questions:

Technical content: 1 2 3 4 5 6 7 8 9 10

Presentation style: 1 2 3 4 5 6 7 8 9 10

Notes:

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Speaking:

Eye contact … make regular eye contact

Position … face the audience, not the screen

Volume … strong, but check that audio clips not overdriven

Confidence … be in control, sound sure

UM’s, “u-kn” … 1-10 is OK , 35-70 is 

don’t rush – take time between each sentence, slide

negatives …. Profession presentation;

No – apologies, bad/slang words, negatives

(“I’m don’t quite understand this, but …”)

other … don’t read slides

(particularly lists of items )

time … 8-14 minutes

(look for moderator waving the watch)

questions … allow a time for questions

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Slides:

Name and title

Font Size … not too small

Colors ……. contrasting colors

Density …. not long text; use bullets, key words

7 + - 2 … few points per slide;

except of lists of example items

Diagrams … very helpful

Concept & example … need both

References … included

Questions … allow a point for questions

Difficulty … don’t re-do the basic concepts of 764 ;

do contribute “new” information.

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

* send slides in advance

or have them loaded on your machine

* record audio clips

(sometime .. before, during, after the talk)

(submit final slides with audio for posting)

* post on your homework page:

~ 2 page summary / overview of your slides:

w. name, title, main definition, your purpose, references

[ Why … evaluation of writing proficiency.]

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

Final evaluation questions (at the end of the semester):

First, provide a

collection of 2 sentence reviews of each (most) talks:

(a) what is the subject (brief statement/definition)

(b) what did the presenter say / present about the subject

e.g. Intro, overview, example, critique,

relation to other topic, …?

More about this at the end.

http://www.cis.ksu.edu

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CIS 764 Database Systems Engineering

end.

http://www.cis.ksu.edu