Essay on Chpt 1

8849 Words Jan 26th, 2013 36 Pages
Systems Analysis and Design
Ninth Edition
End of Chapter Solutions
Chapter one

Introduction to Systems Analysis and Design

ANSWERS TO CASE-SIM: SCR ASSOCIATES

Introductory note: The SCR case study provides a valuable real-world experience for students. The case involves an imaginary IT consulting firm that maintains a realistic Web site, complete with a company intranet that students can access. The student becomes an entry-level systems analyst reporting to a supervisor named Jesse Baker.
In each session, the student receives e-mail messages, voice mail messages, and a list of tasks to perform. The voice mail all comes from Jesse Baker, and the e-mail messages come from Jesse Baker and other members of the
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5. How do companies use EDI? What are some advantages of using XML?
Online trading marketplaces initially were developed as company-to-company data-sharing arrangements called electronic data interchange (EDI). EDI enabled computer-to-computer transfer of data between companies, usually over private telecommunications networks. Firms used EDI to plan production, adjust inventory levels, or stock up on raw materials using data from another company’s information system. As B2B volume soared, the development of extensible markup language (XML) enabled company-to-company traffic to migrate to the Internet, which offered standard protocols, universal availability, and low communication costs. XML is a data description language that allows Web-based communication between different hardware and software environments. XML is extremely flexible because it is concerned with the data itself rather than the output format. For example, a user could view XML customer data as a Web page on a notebook computer or as a contact list on a PDA. The unique advantage of XML is that data description is not linked to output formatting. This is just the opposite of HTML (hypertext markup language), where the language controls the way the information is displayed on a Web browser. (Page 14)

6. Describe five types of information systems, and give an example of each.
Information systems include enterprise computing systems, transaction processing systems, business

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