AIS2 - Representation and Patterns An Introduction to the...

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Representation and Patterns: An Introduction to the REA Enterprise Ontology
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Chapter Learning Objectives Explain the importance of representation and modeling in enterprise system design and use Identify various types of patterns and recognize patterns in the world around you Describe the purpose and the components of the four levels of the REA ontology Identify an enterprise’s external business partners Identify resources that are exchanged between an enterprise and its business partners Develop a value system level REA model for an enterprise Identify an enterprise’s business processes (transaction cycles) Identify the resource flows between an enterprise’s business processes and the economic events that cause those resource flows Develop a value chain level REA model for an enterprise 2
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Representation Depiction of Reality with Symbols People are real things Identification cards (name cards) are representations of those people Alternatively you could say name cards are symbols that represent those people What other representations of people can you think of? Which of these is likely to be the best representation? 3
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Models as Representations What is a model? A model is a simplification of something in reality Created for a specific purpose Hides details that are not needed for that purpose Why do we build models of enterprise systems? We build models so that we can better understand the system we are developing. Most enterprise systems are too large and complex for the average person to comprehend in entirety. 4
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