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A Comprehensive Model for Web Sites Quality

Oreste Signore, <oreste.signore@isti.cnr.it>
CNR-ISTI
via Moruzzi, 1
56124 Pisa


WSE 2005

7th IEEE International Symposium on Web Site Evolution
Budapest, Hungary - September 26, 2005


Slides at: http://www.weblab.isti.cnr.it/talks/2005/wse2005/

Table of contents

Talk layout

Views on quality

But many overlaps

Why?

Therefore ...

Or, again the old problem of maintenance:

... and we have yet legacy web sites !!

Talk layout

Some considered evaluation criteria

Some considerations

Talk layout

A possible strategy

Five dimensions

  1. Correctness
  2. Presentation
  3. Content
  4. Navigation
  5. Interaction

The process

Evaluation is ... a semantic activity that needs the human intervention

The (elementary) site model

Some aspects are ignored

Information stored in the quality database can improve maintenance

The page components

Talk layout

Correctness

Automatically checked, at page granularity

Presentation

Several aspects to consider:

[goto content issues]

Presentation: layout

Immediately perceived by the user (at first glance the site is ...)

[back to presentation issues]

Presentation: text

Ease of reading (size, color)

[back to presentation issues]

Presentation: multimedia

Function: essential element or just page enrichment

[back to presentation issues]

Presentation: links

Essential component - here considered just as far as presentation is concerned

[back to presentation issues]

Presentation: forms

Considering only presentation (accessibility) issues

Example
esempio di form corretto

[back to presentation issues]

Content

Correctness
very important in some contexts (e.g. for cultural web sites)
Readability
  • not just a recent and web related issue (see Flesh, and Rudolph, "The Art of Readable Writing", Macmillan Publishing, 1949)
  • readability index, related to the web site purpose and user's skill
Information architecture
  • different difficulty levels
  • summary and details
  • stretchable text
  • user customizable content
Information structuring
  • number of subheading per heading
  • number of paragraphs per heading
  • mean paragraph length
  • total paragraph length
  • number of sentences in a paragraph
Author vs webmaster

Navigation (1)

Navigation (2)

"All the links are equal, but some links are more equal than others"

Interaction (form)

Transparency
user is advised of form filling and submitting consequences
Recovery
UNDO
  • in the form page
  • after operation completion, the user is advised of effects, and undo is possible
Annotation
user can contribute to the content

Talk layout

Other issues

A blueprint (summarizing)

All criteria can be related to some measurable characteristics

Talk layout

Conclusion

Thanks for your attention

Questions?


If it isn't on the web it doesn't exist ...

... you will find on the WebLab (http://www.weblab.isti.cnr.it/) web site
the slides (http://www.weblab.isti.cnr.it/talks/2005/wse2005/)