44
Figure 2. 2 Context Diagram for the Customer
Support System (satzinger,
pg.86)
2.2.4 Entity Relationship
Diagram
An Entity Relationship Diagram (ERD) is an end product of the modeling
process of Entity Relationship Model; It also known as the type of conceptual
data model. This model is shown how logic the relationship between the data
and represent the data entities and the relation.
For
Information
system,
this
model
use
for
describe type of information to be
store in database during analysis. It is important for Information system to
recognize the relation between data entries. An entry is like people, place, ID,
etc; where it shown as the data information that must be stored in the
respect
entity. The written of the entity must be a name in single noun and use the
capital
letter.
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