System Development and Analysis

John Staab, CEO

Concept of Normalization

Carla’s Design

ERD

Third Normal Form

10 Tasks

Concurrent Tasks

Sequential Tasks

Normalization is basically any process of conforming an object to rules and regulations. This can include the removal or errors in repeated data to create a common scale for measurement.

Carla’s design contains a repeating group and is therefore “unnormalized”. All of the fields are contained in a single table with a repeating group of six fields.

D E PA RT M E N T

E M PLO Y S

PRO JE C T

1

M M

IN C URS

PRO JE C T -HO URS

M

E M PLO Y E E

C HA RG E S

1 1

PROJECT (PROJECT-NUMBER, PROJECT-NAME, START-DATE, PROJECT-STATUS)

EMPLOYEE (EMPLOYEE-NUMBER, EMPLOYEE-NAME, DEPARTMENT-NUMBER, JOB-TITLE)

PROJECT HOURS (PROJECT-NUMBER, EMPLOYEE-NUMBER, PROJECT-HOURS)

DEPARTMENT (DEPARTMENT-NUMBER, DEPARTMENT-NAME)

Identify all entities

Create initial ERD

Identify Tables

Design Tables

Identify Normal Form

Sample Data

Normalization

Final ERD

Documentation

Lessons Learned

Identify all entities

Identify Tables

Identify Normal Forms to be used

Create Sample Data

Normalization

Documentation

Lessons Learned

Create initial ERD (dependant on entity identification)

Design Tables (dependant of table identification)

Final ERD (requires initial ERD and normalization)