Chapter 4 - The REA enterprise ontology: Business process level modeling. The objective of this chapter is to present a template pattern for modeling enterprise business processes (transaction cycles) that serves as the structure for an enterprisewide database. | Chapter 4 The REA Enterprise Ontology: Business Process Level Modeling Acknowledgement: Many of the slides for this chapter are adapted from class materials prepared by Professor William E. McCarthy at Michigan State University Chapter Learning Objectives Explain entity-relationship conceptual modeling notation in diagrammatic and grammar formats Assign cardinalities to represent the participation of REA entities in prescribed relationships Identify economic exchanges that form the core of business processes Identify commitment events that lead to economic exchange events Identify instigation events that lead to mutual commitment events Identify resources involved in instigation, commitment, and economic events Identify agents (internal and external) involved in instigation, commitment, and economic events Create a conceptual model for a business process following the REA pattern 4- Conceptual Modeling Constructs Entities Sets of real world objects – things that have a separate existence, either physical or conceptual Note SETS Relationships Sets of associations between entities Again, note SETS Degrees of relationships 4- Example Entities and Relationships 4- Conceptual Modeling Constructs Attributes Characteristics or elementary properties of entities and/or relationships Primary key attribute uniquely and universally identifies each instance of an entity or relationship set Simple versus composite attributes Derivable attributes Static – will not change if new data is entered into system Volatile – will change if new data is entered into system 4- Conceptual Modeling Constructs Participation Cardinalities (Min,Max) Minimum cardinality: expresses the minimum number of times one instance of an entity set must participate in a relationship. 0 = optional participation 1 = mandatory participation Maximum cardinality: expresses the maximum number of times one instance of an entity set may participate in a relationship 1 = one-time only . | Chapter 4 The REA Enterprise Ontology: Business Process Level Modeling Acknowledgement: Many of the slides for this chapter are adapted from class materials prepared by Professor William E. McCarthy at Michigan State University Chapter Learning Objectives Explain entity-relationship conceptual modeling notation in diagrammatic and grammar formats Assign cardinalities to represent the participation of REA entities in prescribed relationships Identify economic exchanges that form the core of business processes Identify commitment events that lead to economic exchange events Identify instigation events that lead to mutual commitment events Identify resources involved in instigation, commitment, and economic events Identify agents (internal and external) involved in instigation, commitment, and economic events Create a conceptual model for a business process following the REA pattern 4- Conceptual Modeling Constructs Entities Sets of real world objects – things that have a separate .
