DreamHome Case Study

Description


Resource:

  • Appendix A, “User Requirements Specification for

    DreamHome

    Case Study” of

    Database Systems: A Practical Approach to Design, Implementation and Management

    (6

    th

    edition).


Review

the “User Requirements Specification for

DreamHome

Case Study” of

Database Systems: A Practical Approach to Design, Implementation and Management.


Design

a distributed database for

DreamHome

and

illustrate

it in Microsoft

®

Visio

®

.


Include

the following in your database:

  • Models representing the conceptual, logical, and physical database designs
  • Annotations identifying the appropriate elements. For example, the Physical Model annotations would include design base relations; identification of primary keys, foreign keys, and alternate keys; some data definitions (NOT NULL); relational integrity constraints; and general constraints


Note:

The results of this assignment will be used in future

DreamHome

-related Individual Assignments in Weeks Two, Three, Four, and Five.

Appendix A Users’ Requirements
Specification for DreamHomeCase
Study
Objectives
In this appendix you will learn:

The data and transaction requirements for the Branch and Staff user
views of the DreamHome case study described in Section 11.4 .
This appendix describes the users’ requirements specification for the Branch and Staff user
views of the DreamHome database system. For each collection of user views, the “Data
Requirements” section describes the data used and the “Data Transactions” section provides
examples of how the data is used.
A.1 Branch User Views
of DreamHome
A.1.1 Data Requirements
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 manges 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 includes 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.
A.1.2 Transaction Requirements (Sample)
Data entry

Enter the details of a new branch (such as branch B003 in Glasgow).

Enter the details of a new member of staff at a branch (such as Ann Beech at branch B003).

Enter the details of a lease between a client and property (such as client Mike Ritchie renting
out property number PG4 from the 10-May-12 to 9-May-13).

Enter the details of a property advertised in a newspaper (such as property number PG4
advertised in the Glasgow Daily newspaper on the 06-May-12).
Data update/deletion

Update/delete the details of a branch.

Update/delete the details of a member of staff at a branch.

Update/delete the details of a given lease at a given branch.

Update/delete the details of a newspaper advertisement at a given branch.
Data queries
Examples of queries required by the Branch user views:

(a) List the details of branches in a given city.

(b) Identify the total number of branches in each city.

(c) List the name, position, and salary of staff at a given branch, ordered by staff name.

(d) Identify the total number of staff and the sum of their salaries.

(e) Identify the total number of staff in each position at branches in Glasgow.

(f) List the name of each Manager at each branch, ordered by branch address.

(g) List the names of staff supervised by a named Supervisor.

(h) List the property number, address, type, and rent of all properties in Glasgow, ordered by
rental amount.

(i) List the details of properties for rent managed by a named member of staff.

(j) Identify the total number of properties assigned to each member of staff at a given branch.

(k) List the details of properties provided by business owners at a given branch.

(l) Identify the total number of properties of each type at all branches.

(m) Identify the details of private property owners that provide more than one property for
rent.

(n) Identify flats with at least three rooms and with a monthly rent no higher than £500 in
Aberdeen.

(o) List the number, name, and telephone number of clients and their property preferences at
a given branch.

(p) Identify the properties that have been advertised more than the average number of times.

(q) List the details of leases due to expire next month at a given branch.

(r) List the total number of leases with rental periods that are less than one year at branches in
London.

(s) List the total possible daily rental for property at each branch, ordered by branch number.
A.2 Staff User Views of DreamHome
A.2.1 Data Requirements
Staff
The data required on members of staff includes staff number, name (first and last name),
position, gender, date of birth (DOB), and name of the Supervisor (where appropriate). Members
of staff in the position of Supervisor supervise an allocated group of staff (up to a maximum of
10 at any one time).
Properties for rent
The data stored on property for rent includes property number, address (street, city, and
postcode), type, number of rooms, monthly rent, and the details of the property owner. The
monthly rent for a property is reviewed annually. Most of the properties rented out
by DreamHome are apartments (or flats). The management of a property is assigned to a
member of staff whenever it is rented out or ready to be rented out. A member of staff may
manage a maximum of 100 properties for rent at any one time.
Property owners
There are two main types of property owner: private owners and business owners. The data
stored on private owners includes owner number, name (first and last name), address, telephone
number, email, and password. The data stored on business owners includes owner number, name
of business, business type, address, telephone number, email, password, and contact name.
Clients
When a prospective client registers with DreamHome, the data stored includes the client
number, name (first and last name), telephone number, email, and some data on the desired
property, including the 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 registered the new client.
Property viewings
Clients may request to view property. The data stored includes client number, name and
telephone number, property number and address, date the client viewed the property, and any
comments made by the client regarding the suitability of the property. A client may view the
same property only once on a given date.
Leases
Once a client finds a suitable property, a lease is drawn up. The information on the lease includes
lease number, client number and name, property number, address, type and number of rooms,
monthly rent, method of payment, deposit (calculated as twice the monthly rent), whether the
deposit is paid, the start and end dates of the rental period, and the duration of the lease. The
lease number is unique across all DreamHome branches. A client may hold a lease associated
with a given property from a minimum of three months to a maximum of 1 year.
A.2.2 Transaction Requirements (Sample)
Data entry

Enter the details for a new property and the owner (such as details of property number PG4
in Glasgow owned by Tina Murphy).

Enter the details of a new client (such as details of Mike Ritchie).

Enter the details of a client viewing a property (such as client Mike Ritchie viewing property
number PG4 in Glasgow on the 06-May-12).

Enter the details of a lease between a client and property (such as client Mike Ritchie renting
out property number PG4 from the 10-May-12 to 9-May-13).
Data update/deletion

Update/delete the details of a property.

Update/delete the details of a property owner.

Update/delete the details of a client.

Update/delete the details of a property viewing by a client.

Update/delete the details of a lease.
Data queries
Examples of queries required by the Staff user views:

(a) List details of staff supervised by a named Supervisor at the branch.

(b) List details of all Assistants alphabetically by name at the branch.

(c) List the details of property (including the rental deposit) available for rent at the branch,
along with the owner’s details.

(d) List the details of properties managed by a named member of staff at the branch.

(e) List the clients registering at the branch and the names of the members of staff who
registered the clients.

(f) Identify properties located in Glasgow with rents no higher than £450.

(g) Identify the name and telephone number of an owner of a given property.

(h) List the details of comments made by clients viewing a given property.

(i) Display the names and phone numbers of clients who have viewed a given property but
not supplied comments.

(j) Display the details of a lease between a named client and a given property.

(k) Identify the leases due to expire next month at the branch.

(l) List the details of properties that have not been rented out for more than three months.

(m) Produce a list of clients whose preferences match a particular property.

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