Assessment item 2
Modelling
Value: 10%
Due Date: 21-Dec-2018
Return Date: 17-Jan-2019
Submission method options: Alternative submission method
Task
Overview of business case:
Granite Sales Company keeps information on employees and the departments that they work
in. For each department, the department name, internal mail box number, and office phone
extension are kept. A department can have many assigned employees, and each employee is
assigned to only one department. Employees can be salaried employees, hourly employees,
or contract employees. All employees are assigned an employee number. This is kept along
with the employee’s name and address. For hourly employees, hourly wage and target weekly
work hours are stored (e.g. the company may target 40 hours/week for some, 32 hours/week
for others, and 20 hours/week for others).
Some salaried employees are salespeople that can earn a commission in addition to their
base salary. For all salaried employees, the yearly salary amount is recorded in the system.
For salespeople, their commission percentage on sales and commission percentage on profit
are stored in the system. For example, John is a salesperson with a base salary of $50,000 per
year plus 2-percent commission on the sales price for all sales he makes plus another 5
percent of the profit on each of those sales. For contract employees, the beginning date and
end dates of their contract are stored along with the billing rate for their hours.
Task 1: Write all possible business rules for the above case study. 3 Marks
Task 2: Create an ERD (using a specialization hierarchy if appropriate ) that represents the
entities, attributes, the relationships between entities, and the cardinality and optionality
of each relationship that are described by this business rule. 7 Marks
NOTE
Use https://www.draw.io to create your ERD
Use Crows Foot notations
Include the PKs where appropriate
Any M:N relationship is to be resolved to a 1:M relationship
Manually drawing the ERD is NOT acceptable.
Rationale
This assessment task will assess the following learning outcome/s:
• be able to model complex business rules using Entity Relationship Diagrams (ERDs).
Marking criteria and standards
The marking criteria for this assignment is:

Requirements
Either save your ERD diagram as a PDF or embed it in a Word document.
Don’t use any other file formats
Don’t submit your file in XML
Please include your student ID, name and subject code in the diagram