Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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CASE STUDY
Study the DreamHome case study presented below to answer the following 
questions
DreamHome is a company that provides rental services to both home owners and 
clients. 
This case study describes the users’ requirements specification for the 
DreamHome database system.
Branches
DreamHome has branch offices in cities throughout the United Kingdom. Each 
branch office is allocated members of staff, including a Manager, who manages 
the operations of the office. The data describing a branch office includes a unique 
branch number, address (street, city, and postcode), telephone numbers (up to a 
maximum of three), and the name of the member of staff who currently manages 
the office. Additional data is held on each Manager, which includes the date that 
the Manager assumed his or her position at the current branch office, and a 
monthly bonus payment based upon his or her performance in the property for 
rent market.
Staff
Members of staff with the role of Supervisor are responsible for the day-to-day 
activities of an allocated group of staff called Assistants (up to a maximum of 10, 
at any one time). Not all members of staff are assigned to a Supervisor. The data 
stored regarding each member of staff includes staff number, name, address, 
position, salary, name of Supervisor (where applicable), and the details of the 
branch office at which a member of staff is currently working. The staff number is 
unique across all branches of DreamHome.
Properties for rent
Each branch office offers a range of properties for rent. The data stored for each 
property includes property number, address (street, city, postcode), type, number 
of rooms, monthly rent, and the details of the property owner. The property 
number is unique across all branch offices. The management of a property is 
assigned to a member of staff whenever it is rented out or requires to be rented 
out. A member of staff may manage a maximum of 100 properties for rent at any 
one time. When a given property is available for rent, the property details will be displayed on the DreamHome Web site and, when necessary, as advertisements 
in local and national newspapers.
Property owners
The details of property owners are also stored. There are two main types of 
property owner: private owners and business owners. The data stored for private 
owners include owner number, name, address, telephone number, email, and 
password. The data stored on business owners includes name of business, type of 
business, address, telephone number, email, password, and contact name. The 
password will allow owners access to parts of the DreamHome database using the 
Web.
Clients
DreamHome refers to members of the public interested in renting property as 
clients. To become a client, a person must first register at a branch office of 
DreamHome. The data stored on clients includes client number, name, telephone 
number, email, preferred type of accommodation, and the maximum rent that 
the client is prepared to pay. Also stored is the name of the member of staff who 
processed the registration, the date the client joined, and some details on the 
branch office at which the client registered. The client number is unique across all 
DreamHome branches.
Leases
When a property is rented out, a lease is drawn up between the client and the 
property. The data listed in detail on the lease includes lease number, client 
number, name and address, property number and address, monthly rent, method 
of payment, an indication of whether the deposit has been paid deposit 
(calculated as twice the monthly rent), duration of lease, and the start and end 
dates of the lease period.
Newspapers
When required, the details of properties for rent are advertised in local and 
national newspapers. The data stored includes the property number, address, 
type, number of rooms, rent, the date advertised, the name of the newspaper, 
and the cost to advertise. The data stored on each newspaper includes the 
newspaper name, address, telephone number, and contact name.

 

i. What are the main objects that need to be represented in the DreamHome
database and what relationships do you think exist between these objects

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