1. Reminder:
• Bring 3 sample forms from any office, agency, etc. for
next Thursday, January 31st
• Quiz about Input Devices table (chapter 8, figure 8-
34, 8th edition) next Tuesday, February 5th.
1

2. Systems Analysis and Design
Chapter 8
Output and User Interface Design
(part 2)

3. Designing a Web Site
• You can borrow some of the design principles from designing
displays.
• The Web, however, is a very uncontrolled environment for
output.
• Different browsers
• Screen resolution varies
• Handheld devices
• JavaScript, cookies, other Web programming elements affect how
users view Web sites
11-3

4. General Guidelines for Designing a
Web Site
• Use professional tools
– Macromedia Dreamweaver
– Faster than working directly with HTML
• Studying other sites
– It is not legal to cut and paste pictures or codes, but you
can learn from other sites
• Firefox’s Web Developer extension
• Palette Grabber extension
• Use Web resources
– Nielsen Normal Group: gives hints on design & usability
11-4

5. Designing a Web Site
• Examine the sites of professional Web site
designers
• Use the tools you’ve learned
– Use a form to evaluate sites systematically
• Consult the books
• Follow World Wide Web Consortium
standards (W3C)
11-5

6. Designing a Web Site
• Examine poorly designed Web pages
– webpagesthatsuck.com (good and bad sites)
• Also provides links to material about Web site creation
• www.bow-wowbooks.com (rated world’s worst site of 10/2007)
• www.snarg.net (worst use of navigation)
11-6

7. Designing a Web Site (Continued)
• Creating Web templates
– Style sheets (CSS) allow you to format all Web
pages in a site consistently
• A change in the style sheet file will affect/update all
pages using that style sheet.
• Using plug-ins, audio, and video sparingly
– Not everyone has the latest plug-in
11-7

8. Designing a Web Site (Continued)
• Plan ahead, pay attention to:
– Structure
– Content
– Text
Good Web sites are
– Graphics well thought out!
– Presentations style
– Navigation
– Promotion
11-8

9. Structure
• One of the most important steps in developing
a professional Web site
– Think about your goals and objectives
• Web designers can benefit from using Web site
diagramming and mapping tools
– Ex. MS Visio, SmartDraw, Omnigraffle (Mac)
• Each page in the Web structure should have a
distinct message
– Ecommerce? Informative? Marketing? Etc.
Sample Web sites shown to contrast structure 

10. This sample site pays attention to supporting users by using various features
10

11. 11

12. 12

13. 13

14. MS Visio can help an analyst to develop a conceptual Web site
11-14

15. MS Visio helps evaluate broken links (internal or external)
15

16. Content
• Without anything to say, your Web site will fail
• Appropriate content is needed to keep the user
interested
– Stickiness: exists if a user stays for a long period of time
– Sticky Web sites statistics
• Use a metaphor or images that provide metaphor
for your site
– You can use a theme
– Avoid overuse of cartoons and don’t be repetitive

11-16

17. 17

18. Content (Continued)
• Should include a FAQ page
– based on the experiences of users and technical support people who
identify the topics of continuing concern
• May take advantage of prewritten software (COTS)
– Search engines, mapping software, weather info, news and
stock tickers, etc.
• These are bonus content for the visitor
Commercial Off-
The Shelf
11-18

19. Text
• Each Web page should have a title
• Place meaningful words in the first sentence
appearing on your Web page
• Clear writing is important
– https://www.schooloutfitters.com/catalog/index
11-19

20. Use one of the most
commonly used image
Graphics formats PING
• Lossless.
• More compression
JPEG GIF than GIF
• Best for artwork • No animation
• Best for
• Limited to 256 colors • Less degradation of
photographs quality
• Lossless compression
• 16.7 million • May include transparent • Better interlacing
colors background • Control of transparency
• Lossy • May be interlaced (opacity)
compression • Not all browsers
support it but patent-
free
11-20

21. Graphics (Continued)
• Keep the background simple and readable
• When using a background pattern, make
sure that you can see the text clearly on top
of it 11-21

22. Graphics (Continued)
• Keep the background simple and readable
• When using a background pattern, make sure that
you can see the text clearly on top of it
11-22

23. Graphics (Continued)
• Create a few professional-looking graphics for use on
your pages
• Keep images small and reuse bullet or navigational
buttons
– Once an image has been received, it will be taken from the
cache whenever it is used again.
11-23

24. Graphics (Continued)
• Include text in what is called an
ALT attribute for images and
image hot spots
– Provides accessibility for visually
impaired visitors
– May improve Search Engine
Optimization (SEO)
• Examine your Web site on a
variety of displays and screen
resolutions
11-24

25. Presentation Style
• Provide a home page (entry display)
– Rule of thumb: Load in 4 seconds or less (broadband)
• 100 kilobytes of data takes more than 14 seconds to download on
a 56 kbit/s connection (users with dial up: 3% )
– Provide a menu or choices
• left or top of the screen
• Keep the number of graphics to a reasonable
minimum. Why?
– To lower download time
• Use large and colorful fonts for headings
• Use interesting images and buttons for links
11-25

26. Presentation Style (Continued)
• Use cascading style sheets
(CSS) to control the
formatting and layout of the
Web page
– Separates the content from
how they look
– One style sheet may control
the formatting of many pages
(easier to change).
• CSS for a mobile phone/tablet
vs. a desktop screen
11-26

27. Presentation Style (Continued)
• Use divisions and cascading styles
– Tables are not well suited for visually impaired
visitors 
• Use the same graphics image on several Web
pages
– For consistency and faster loading
11-27

28. Presentation Style (Continued)
• Use JavaScript to enhance Web page layout
– Ex. Mouse rollover, expanded menu, screen
resolution detection, international language
detection, etc.
• Avoid overusing animation, sound, and other
elements
– One element at a time
11-28

29. Navigation
• Observe the three-clicks rule
– a user should be able to move from the page they
are currently on to the page containing the
information they want in three clicks of the
mouse button
11-29

30. Web site critique exercise
• Next Tuesday, January 29th:
– Bring a list with 3 URLs from local Web sites (no
social networks, no UPRM) on a sheet of paper.
• Instructions will be given that day.
• Submit homework next Thursday, January 31st
• Individual homework.
• Value: 30 points
30

31. Firefox Web developer extension
31

32. 32

33. Non-interlaced GIF Interlaced GIF
If you use Interlaced images, your readers will be further encouraged to
carry on reading your Web Page, because it will be immediately apparent,
that an image is being loaded, and something is going on.
33