Case Study CTTS - Milestone 04 Data Modeling Solution.doc

MILESTONE 4 – DATA MODELING ? Activity 1 – Entity/Definition Matrix T he entities in the following matrix were identified by analyzing the forms provided in Milestone 4. This list and the following diagrams are based on the author’s assumptions and interpretations. If you, the instructor, choose to do your own solution, it may be different, depending on your interpretation of the forms provided. In most activities explanations for why things were done as they were have been provided to aid in your understanding of the solution. The following tables contain the attributes identified from each form and the interview. PC Configuration Sheet Interview: Machine Name Component Date Installed Date Removed Quantity Component Type Software Configuration Sheet Interview: Client (i.e. Family Vacation Rentals) Machine Name (i.e. SQL Server) Type of Information (i.e. Logon) Multiple Values of Information (i.e. Username: sa / Password: gumb@ll) Students should be able to identify at least the major entities listed below. Whether or not they identify the optional entities will depend on how they interpret the user requirements and on their experience level with database normalization. The following completed matrix is one possible solution. Entity/Definition Matrix ENTITY BUSINESS DEFINITION Major Entities Client A business entity for whom work is done. Equipment A computer, printer, or other piece of technology equipment that is in use. EquipmentComponent A component (anything from a stick of RAM to an entire turn-key system) that is or has been installed in Equipment. Inventory A component that has been checked into inventory Configuration A piece of information concerning software configuration for the Client and possibly for a piece of equipment. SeviceRequest A request for service on Equipment. WorkRecord Work done to resolve a SeviceRequest. Optional Entities EquipType A classification of Equipment. ComponentType A classification of EquipmentComponent. ? Activity 2 – C