Transcript Chapter 15

Chapter 15
Designing Effective Output
Systems Analysis and Design
Kendall and Kendall
Fifth Edition
Major Topics
Designing output
Output technologies
Factors in choosing an output
technology
Report design
Screen design
Web site design
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External and Internal Output
Internal output is used within the
corporation
External output is used outside the
organization
External output differs from internal
output in its design and appearance
A turnaround document is one that is
sent out and then returned
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Designing Output
Output should be designed to
Serve the intended purpose
Be meaningful to the user
Deliver the right quantity of output
Deliver it to the right place
Provide output on time
Choose the right output method
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Output Technologies
Output can be in the form of
Print
Screen
Audio
CD-ROM or CD-RW
DVD
E-mail
The World Wide Web
Electronic output
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Output Technologies
Output technologies differ in their
Speed
Cost
Portability
Flexibility
Storage and retrieval possibilities
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Electronic Output
Electronic output includes
Fax
Electronic mail
The World Wide Web
Bulletin board messages
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Push and Pull Technology
Pull technology allows the user to take
formatted data from the Web
Push technology sends solicited or
unsolicited information to a customer or
client
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Factors in Choosing an Output
Technology
Factors that must be considered when
choosing an output technology are
Who will use the output?
How many people need the output?
Where is the output needed?
What is the purpose of the output?
What is the speed with which output is
needed?
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Factors in Choosing an Output
Technology
How frequently will the output be
accessed?
How long will the output be stored?
Under what special regulations is the
output produced, stored, and distributed?
What are the initial and ongoing costs of
maintenance and supplies?
What are the environmental requirements
for output technologies?
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Output Bias
Analysts must be aware of sources of
output bias and inform users of the
possibilities of bias in output
Bias is introduced in three main ways:
How information is sorted
Setting of acceptable limits
Choice of graphics
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Strategies to Avoid Bias
Strategies to avoid output bias
Awareness of the sources of bias
Design of output that includes users
Working with users so that they are
informed of the output's biases
Creating output that is flexible and allows
users to modify limits and ranges
Train users to rely on multiple output for
conducting "reality tests" on system output
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Printed Reports
Design reports using software
Design guidelines for printed reports
are
Include functional attributes, such as
headings, page numbers, and control
breaks
Incorporate stylistic and aesthetic
attributes, such as extra blank space and
grouping data
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Report Design Considerations
Examine the type of data: alphabetic,
special, or numeric
Constant information does not change
when the report is printed
Variable information changes each time
the report is printed
Specify the paper quality, type, and size
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Computer-Aided Report Design
Steps to follow when designing reports
using a computer-aided software tool
Determine the need for the report
Determine the users
Determine the data items to be included
Estimate the overall size of the report
Title the report
Number the pages of the report
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Computer-Aided Report Design
Further steps for designing reports
Include the preparation date on the report
Label each column of data appropriately
Define variable data indicating the type of
data
Indicate the positioning of blank lines used
to help organize information
Review prototype reports with users and
programmers
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Report Stylistic and Aesthetic
Elements
Stylistic/aesthetic elements of printed
reports include
Organization
Control breaks
Blank spaces
Margins
Color coding
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Online Screen Design
Online screens are designed using
screen design software
Guidelines for screen design are
Keep the screen simple
Keep the screen presentation consistent
Facilitate user movement among screens
Create an attractive screen
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Graphs
Primary considerations for designing
graphical output
Output must be accurate, easy to
understand and use
The purpose of the graph must be
determined
Decision makers must be trained in using it
Provide the ability to call up a variety of
user views as well possible commands
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Web Site Design
Design principles must be used when
designing Web sites
These include
Using professional tools
Studying other sites
Using Web resources
Examining the sites of professional Web
site designers
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Web Site Design
Further principles
Using tools that you are familiar with
Consulting books
Looking at examples of poorly designed
pages
Creating Web templates. Style sheets
allow you to format all Web pages in a site
consistently
Using plug-ins, audio, and video sparingly
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Tips for Corporate Web Sites
To improve the presentation of a
corporate Web site
Provide an entry screen or home page
Keep the number of graphics to a
reasonable minimum
Use large and colorful fonts for headings
Use interesting images and buttons for
links
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Tips for Corporate Web Sites
Ideas continued
Use the same graphics image on several
Web pages
Avoid overusing animation, sound, and
other “busy” elements
Provide an area on the left side or on the
top of the Web page for links to other
pages in the Web site
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Tips for Corporate Web Sites
Ideas continued
Make sure that your Web page does not
scroll horizontally, keep the vertical page
under 2½ screens
Make sure that your initial page loads
quickly
Add one or two Java applets if possible
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Planning a Web Site
Planning a Web site involves
Designing the structure of the Web site
Focusing on the content
Using meaningful text
Including appropriate graphics
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Planning a Web Site
Further Web site planning guidelines
Paying attention to the presentation of the
Web site, with a consideration of download
times
Constructing navigational links
Promoting the Web site
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Promoting the Web Site
You can encourage companies to
promote your Web sites by:
Using e-mail to promote your site
Encouraging readers to bookmark your site
Submitting your site to search engines
Making it clear who is maintaining the Web
site
Performing perpetual maintenance of the
Web site
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