Entity Function Matrix – Putting It All Together Northern College Diploma Philip Bird

Information Systems Philip Bird The SSADM Route Entity Model Entity Life History Data Flow ModellingEntity Modelling Entity Function Matrix Current Physical DFD Current Logical DFD Required Physical DFD Required Logical DFD Problems and new requirements

Information Systems Philip Bird Entity Function Matrix Cross reference entities with functions. List all entities from entity modelling. List all functions from data flow modelling. Mark the intersection with a Delete, Read, Modify, Create or leave blank. In a full system all entities should have D, C, R/M entries.

Information Systems Philip Bird Order Processing DFD Place order Product Customer Add new customer Order Customer Supplier Get stock delivery Cancel order

Information Systems Philip Bird Order Processing Entity Model Customer Order Order lineProduct

Information Systems Philip Bird Entity Function Matrix Place order Product Customer Add new customer Order Customer Supplier Get stock delivery Cancel order Process Process 1 Place order 2 Cancel order 3 Get stock delivery 4 Add new customer

Information Systems Philip Bird Entity Function Matrix Customer Order Order lineProduct Process 1 Place order 2 Cancel order 3 Get stock delivery 4 Add new customer Entity Process CustomerOrderProduct

Information Systems Philip Bird Entity Function Matrix Entity Process CustomerOrderProduct 1 Place order 2 Cancel order 3 Get stock delivery 4 Add new customer RC M RD M M C