Creating an Entity-Relationship (ER) diagram for the SPL Saudi Post system involves identifying the entities, their attributes, and the relationships between them. Below is a breakdown of the entities and their attributes based on the provided information, followed by a textual representation of the ER diagram.

Entities and Attributes

1. Shipped Item

– Attributes:- Item Number (Primary Key)
– Weight
– Dimensions
– Insurance Amount
– Destination
– Final Delivery Date

2. Retail Center

– Attributes:- Unique ID (Primary Key)
– Type
– Address

3. Transportation Event

– Attributes:- Schedule Number (Primary Key)
– Type (Flight, Truck)
– Delivery Route

Relationships

– A Shipped Item is received at a Retail Center. (One-to-Many)
– A Shipped Item can be associated with one or more Transportation Events as it moves towards its destination. (One-to-Many)

Textual Representation of the ER Diagram

Below is a textual representation of how the ER diagram would look:

[ Shipped Item ]
| Item Number (PK)
| Weight
| Dimensions
| Insurance Amount
| Destination
| Final Delivery Date
|
| 1
|
| N
|
[ Retail Center ]
| Unique ID (PK)
| Type
| Address
|
| 1
|
| N
|
[ Transportation Event ]
| Schedule Number (PK)
| Type (Flight, Truck)
| Delivery Route

Visual Representation of the ER Diagram

While I cannot draw images directly, I can describe how you might visualize it:

1. Rectangles represent entities: “Shipped Item,” “Retail Center,” “Transportation Event.”
2. Ellipses represent attributes connected to their respective entity.
3. Diamonds represent relationships, which can be labeled as “Receives” between “Shipped Item” and “Retail Center,” and “Associated With” between “Shipped Item” and “Transportation Event.”
4. Lines connecting entities and relationships indicate how they are related, with cardinalities noted (1:N) where applicable.

ER Diagram Summary

This ER diagram effectively captures the key components of the SPL Saudi Post system, including how shipped items interact with retail centers and transportation events. The design allows for a clear understanding of the data structure needed for the application, facilitating product tracking within the SPL system. If you need this visual representation generated using specific tools or software, feel free to let me know.