This assignment has been designed to assess students’ ability to model a database, by constructing an entity-relationship diagram for a particular business scenario. This assignment addresses the following learning objectives for this subject:
Develop a database model using the entity-relationship model
Apply the techniques of normalisation
1) You are to write a brief discussion of your solution, i.e. how you approached the modeling problem and any issues you may have encountered (maximum of ½ page)
2) You are to write all applicable business rules necessary to establish entities, relationships, optionalities, connectivities, cardinalities and constraints. If a many–tomany relationship is involved, state the business rules regarding the bridging entities after breaking down the many-to-many relationship. An example business rules format can be found in Appendix A of this document.
3) Based on these business rules*, draw a fully labeled and implementable EntityRelationship Diagram (ERD). Include all entities, relationships, optionalities, connectivities, cardinalities and constraints. You must use Crow’s foot notation and MS Visio (or other software) to create the ERD. A Hand-drawn ERD will NOT be accepted. A sample ERD can be found in Appendix A of this document. (Note: The ERD created using Visio will need to be saved as an image file and then be included in your document file to be submitted)
4) A summary to describe the major justifications, assumptions and limitations related to your database design. For example:
Assumption/justifications for optionalities, connectivities, constraints data type and data domain; and
Special cases or data integrity issues that cannot be handled.
*NOTE: Designing the database is an iterative process; you may find yourself going back and forth between Tasks 2 and 3 to revise the design. Make sure that your final submission shows consistent design in the business rules (Task 2) and ERD (Task 3).