Question

3. (12 points) For each of the descriptions below, develop an ER diagram using draw.io.
Create a new page in your draw.io file for each diagram and name them appropriately
(e.g., “3a” and “3b”). Include entities, attributes (identifier, simple, composite, derived),
relationships (cardinality, modality).
a. A car company has a database where each car has an identifying serial number
and a manufacturing completion date. Each car is an example of a certain model.
All models have an identification number, name (e.g., Camry), and designer.
Over time, the company often manufactures thousands of cars of a certain
model, and the model design is specified before any single car exists.
b. The car manufacturer (see above) employs technicians who are responsible for
inspecting the cars before they are shipped to customers. Each car must be
inspected by at least two technicians (identified by their employee number). For
each separate inspection, the company needs to record its date and a quality
evaluation grade. Copy your entities and relationships you created in part a,
then add the necessary entities and relationships described in part b.

Answer 1

3 (a)

3 (b)