Assignment 3

INF 284

Alan Gates

5/23/07


3. Use the following business rules to create a Crow’s Foot ERD. Write all appropriate connectivities and cardinalities in the ERD.

a. A department employs many employees, but each employee is employed by one department.

b. Some employees, known as “rovers”, are not assigned to any department.

c. A division operates many departments, but each department is operated by one division.

d. An employee may be assigned many projects, and a project may have many employees assigned to it.

e. A project must have at least one employee assigned to it.

f. One of the employees manages each department, and each department is managed by only one employee.

g. One of the employees runs each division, and each division is run by only one employee.

 

 

 

 

4. During peak periods, Temporary Employment Corporation (TEC) places temporary workers in companies. TEC’s manager gives you the following description of the business:

 

CODE

DESCRIPTION

SEC-45

Secretarial work, at least 45 words per minute.

SEC-60

Secretarial work, at least 60 words per minute.

CLERK

General clerking work.

PRG-VB

Programmer, Visual Basic

PRG-C++

Programmer, C++

DBA-ORA

Database Administrator, Oracle

DBA-DB2

Database Administrator, IBM DB2

DBA-SQLSERV

Database Administrator, MS SQL Server

SYS-1

Systems Analyst, level 1

SYS-2

Systems Analyst, level 2

NW-NOV

Network Administrator, Novell experience

WD-CF

Web Developer,ColdFusion

 

 

 

 

 

 

TEC’s management wants to keep track of the following entities:

 

Given that information, do the following: