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Chapter 2 Role of Information Systems in Organizations Link 2

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Presentation on theme: "Chapter 2 Role of Information Systems in Organizations Link 2"— Presentation transcript:

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.


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