System Analysis and Design

This article provides a list of entities and attributes for System Analysis and Design. It also includes an ER diagram and assumptions made during the process.

Running head: SYSTEM ANALYSIS AND DESIGN
System Analysis and Design
Name of the Student:
Name of the University:
Author Note

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SYSTEM ANALYSIS AND DESIGN
List of Entities and Attributes
The identified list of entities is provided below:
 Staffs
 Addresses
 Customer
 Rentals
 Reservation
 Vehicle
 Vehicle Category
The identified list of attributes for each of the entities are provided below:
 Staffs: StaffNumber, FName, LName, HomeAddress, Gender, DateOfBirth,
OfficeNumber, OfficePhoneNumber
 Addresses: HomeAddress, StreetNumber, Suburd, Post-Code, City, State
 Customer: CustomerNumber, FirstName, LastName, HomeAddress, Gender,
DateOfBirth, TelephoneNumber, DriverLicenseNumber
 Rentals: RentID, RegistrationNumber, CustomerNumber, Borrow_Date, Return_Date,
TotalCost, StaffNumber, VehicleCondition
 Reservation: ReservationID, RegistrationNumber, CustomerNumber,
ReservationPeriod, TotalCost, StaffNumber, VehicleCondition
 Vehicle: RegistrationNumber, CategoryName, Make, Model, Colour,
Rental_Price/Day
 Vehicle Category: CategoryName, Rental_Charges, NumberOSeats
After the identification of the list of entities and attributes the logical model can be
created as defined below:

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SYSTEM ANALYSIS AND DESIGN
Staffs (StaffNumber (primary key), FName, LName, HomeAddress (foreign key), Gender,
DateOfBirth, OfficeNumber, OfficePhoneNumber)
Addresses: HomeAddress (primary key), StreetNumber, Suburd, Post-Code, City, State
Customer: CustomerNumber (primary key), FirstName, LastName, HomeAddress (foreign
key), Gender, DateOfBirth, TelephoneNumber, DriverLicenseNumber
Rentals: RentID (primary key), RegistrationNumber (foreign key), CustomerNumber (foreign
key), Borrow_Date, Return_Date, TotalCost, StaffNumber, VehicleCondition
Reservation: ReservationID (primary key), RegistrationNumber (foreign key),
CustomerNumber (foreign key), ReservationPeriod, TotalCost, StaffNumber,
VehicleCondition
Vehicle: RegistrationNumber (primary key), CategoryName (foreign key), Make, Model,
Colour, Rental_Price/Day
Vehicle Category: CategoryName (primary key), Rental_Charges, NumberOSeats

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SYSTEM ANALYSIS AND DESIGN
ER Diagram
Figure 1: ER Diagram of NSW Car Rental System
Source: (Created by Author)
Assumptions and Justification of the ER Diagram
For the creation of the ER Diagram provided above it is to be noted that majority of
the information has been taken from the case study. However, some additional assumptions
were required before the ER Diagram could be implemented for the formulation of a clear
idea.

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SYSTEM ANALYSIS AND DESIGN
It is to be noted that the case study has defined the home addresses of the customers
and the staffs of the organization as a single attribute but it is to be noted that the attribute is
multi valued one and for denoting the multivalued an additional entity has been assumed and
all the sub attributes of the main attribute has been added as the main attributes in the Home
Address entity.
In addition to this, it is to be noted that the Vehicles are identified by their unique
registration number, however no information about the categorization of the vehicles has
been provided and hence, it has been assumed that there would be some categories and hence
an entity named vehicle category has been added to the Diagram.
It has also been assumed that the Rentals of the organization would be identified by
some unique fields and the filed is denoted by RentID in the rent entity.

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SYSTEM ANALYSIS AND DESIGN
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