Chapter Summaries

Chapter Summaries - Chapter 1 What is an information...

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Chapter 1 What is an information system? An enterprise information system is a set of communication channels in a business organization, combined together in such a way as to form one network by which information if gathered and disseminated. An integrated database is the central component of an integrated system. An integrated database must support all functional areas within an enterprise What are impediments to successful integration? A company may use disparate software applications in the company with different functional departments using different software. Software built for one operating system will not be able to interact with software on another. This means that information cannot be shared between departments. This causes redundancy because each department may have to enter information into there system which is already available in another system. Stovepiped operations: Different functional areas in a company are like a stovepipe where only information flow between the departments can happen at a very high level. This makes integration hard because each department is run like its own company with its own software applications. Information needs to be easily accessible from within every department so decisions can be made from a broad perspective. Artificial constructs vs. natural phenomena Chapter 2 Explain the importance of representation and modeling in enterprise system design and use? Ontology Study of what things exist. Conceptualization Simplified view of the world that we wish to represent for some purpose. Representation The models and symbols used to portray reality. Describe the purpose and the components of the four levels of the REA ontology Value System Level – Global Picture of the firm Focuses on the resources that are exchanged between the enterprise and its various external business partners such as suppliers, customers, creditors/investors, and employees. The value system level is based on expectations rather than actuality(as are all levels of the REA model.) Value Chain Level – Connects business process within the firm
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Focuses on the resource flows between interconnected business processes and on the economic events that accomplish the resource flows. Business process refers to the entire transaction cycle. The commonly interconnected business processes included in a value chain REA model are the financing process, the acquisistion/payment process, the human resources process, and conversion process(manufacturing), and the sales/collection process. Developing a value chain level model provides a great deal of insight about the enterprise and is useful for understanding the enterprises mission, strategy, and overall goals. The value chain level is based on a script pattern(p25). Business Process Level – set of activities that takes input and creates a
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This note was uploaded on 06/13/2008 for the course ACCT 4221 taught by Professor Wormer during the Spring '08 term at Arkansas.

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Chapter Summaries - Chapter 1 What is an information...

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