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Web-based Information systems |
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Introduction
Although the
Internet was originally conceived to share information
among scientists, its global reach, portability, and
relatively low set-up costs have encouraged its use for
commercial purposes. Today, the Internet
and the World
Wide Web support applications ranging from
"small-scale, short-lived services to large-scale
enterprise applications distributed across the Internet
and corporate intranets and extranets."1 These new information systems,
called Web-based Information Systems (WIS), are growing
increasingly complex because of new demands from
organizations and new developments in Web and network
technologies.2 In order to control the scope
and complexity of these systems, traditional information
systems methodologies, such as those used for software
engineering or database design, have been adapted and
improved to address specific constraints of Web-based
information systems. Because of the shorter development
life cycle of WISs, which is driven by the rapid pace of
innovations in Web technologies, studies have
concentrated on the design and implementation phases of
the system life cycle. However, requirements analysis is
as essential in the development of a high-quality
Web-based information system as it is in the development
of a traditional information system.
This paper
discusses the importance of requirements analysis in the
development of a WIS and how it differs from a more
traditional information system. Section
1 provides a brief review of the various types of
WISs and compares their characteristics with those of
traditional information systems. Section
2 introduces current WIS development life cycles and
methodologies. Section
3 discusses elements of WISs requirements analysis.
Section
4 describes how usability methods can be helpful
during the WIS's requirements analysis stage, and Section
5 provides a summary conclusion for the
paper.
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