1. Chapter 2 Role of Information Systems in Organizations Link 2
Chapter 2 Role of Information Systems in Organizations Link 2.1 Reading the Information Architecture Figure 2.12

2. Click the mouse to see how to read this model.
places 1
CUSTOMER n
ORDER
This reads as:
One
customer
may
place
many
orders.
This means that customer data can be stored without the need for a customer to place an order.
Over time, a customer may place more than one order with the organization.
Click the mouse to see how to read this model.

3. Click the mouse to see how to read this model.
places 1
CUSTOMER n
ORDER
This reads as:
An order
must be
placed by
one
customer.
This means that order data cannot be stored without the order being related to an existing customer.
One order must be related to only one customer.
Click the mouse to see how to read this model.

4. Click the mouse to see how to read this model.
CUSTOMER
receives 1 n
DELIVERY
This reads as:
One
customer
may
receive
many
deliveries.
This means that customer data can be stored without the need for a customer to receive a delivery.
Over time, a customer may receive more than one delivery from the organization.
Click the mouse to see how to read this model.

5. Click the mouse to see how to read this model.
CUSTOMER
receives 1 n
DELIVERY
This reads as:
One
delivery
must be
received by
one
customer.
This means that delivery data cannot be stored without the data being related to an existing customer.
One delivery must only be related to one customer.
Click the mouse to see how to read this model.

6. Click the mouse to see how to read this model.
DELIVERY
dispatches m n
PRODUCT
This reads as:
One
delivery
must
dispatch
one or more
products.
This means that delivery data cannot be stored without the data being related to an existing product.
One delivery can be for one product, or more than one product.
Click the mouse to see how to read this model.

7. Click the mouse to see how to read this model.
DELIVERY
dispatches m n
PRODUCT
This reads as:
One
product
may be
dispatched by
one or more
deliveries
This means that product data can be stored without the data being related to an existing delivery.
One product may be subject of 0, 1 or more deliveries.
Click the mouse to see how to read this model.

8. Click the mouse to see how to read this model.
Is for
ORDER
PRODUCT n
This reads as:
One
order
must
be for
one or more
products.
This means that order data cannot be stored without the data being related to an existing product.
One order must be for one product, or more than one product.
Click the mouse to see how to read this model.

9. Click the mouse to see how to read this model.
Is for
ORDER
PRODUCT n
This reads as:
One
product
may
be for
one or more
orders.
This means that product data can be stored without the data being related to an order.
A product can be included on 0, 1 or more orders.
Click the mouse to see how to read this model.

10. Key to Notation ENTITY relationship Group of data.
Structure or action that connects entities together.
Optional relationship. Entity can exist without being associated with an instance of the entity at the other end of the relationship. 1
One instance of an entity. n
Many instances of an entity in a one to many relationship.
Mandatory relationship. Entity cannot exist without being associated with an instance of the entity at the other end of the relationship. m
Many instances of an entity in a many to many relationship.