Assignment 1: Software Engineering Methodologies for RMT Application

This assignment analyzes the software engineering methodologies applied to a real-time money transfer (RMT) application, focusing on the Australian banking system's common features. The assignment includes an introduction to the RMT system, emphasizing its real-time nature and the typical flow of money transfers. The core of the assignment involves creating and explaining an Entity Relationship Diagram (ERD) illustrating the database structure, a Data Flow Diagram (DFD) detailing the data flow processes, and a State Machine Diagram showing the application's states and transitions. Furthermore, the assignment provides control specifications and a data dictionary outlining the attributes of key entities such as sender, account, recipient, and transfer, including data types, lengths, and descriptions. The conclusion summarizes the effectiveness of the application, emphasizing the reduced processing time and the secure handling of money transfers. The assignment is supported by a bibliography of relevant sources.

Running head: SOFTWARE ENGINEERING METHODOLOGIES
Software Engineering Methodologies
Name of the Student
Name of the University
Author’s note:

1SOFTWARE ENGINEERING METHODOLOGIES
Table of Contents
Introduction:....................................................................................................................................2
Entity Relationship Diagram:..........................................................................................................3
Data Flow Diagram:........................................................................................................................4
Control Specifications:....................................................................................................................5
Data Dictionary:...............................................................................................................................5
Conclusion:......................................................................................................................................9
Bibliography:.................................................................................................................................10

2SOFTWARE ENGINEERING METHODOLOGIES
Introduction:
The fund transferring applications are very popular now a days. These application
reduces the amount of effort needed to transfer amount to another bank manually at the bank.
Each instance of the application is installed at the client side or sender. The concept of sender
and recipient is completely dependent on the application instance. The ERD will provide insight
to the data attributes required for database. The DFD shows how the data flows through various
processes. Finally the state machine diagram shows each state of the application what activates
the state.

3SOFTWARE ENGINEERING METHODOLOGIES
Entity Relationship Diagram:
Figure 1: ERD of Bank File Transfer Application
(Source: Created by Author)
The above database model has four entities. Each of the entities represent different
element and factors of the process. The sender and recipient entities represent the human beings
who has account in bank. The sender is the one who authenticate the transaction. If a person who

4SOFTWARE ENGINEERING METHODOLOGIES
is recipient in one person’s application is sending money to that person then role of sender and
recipient interchanges.
Data Flow Diagram:
Figure 2: DFD of Bank File Transfer Application
(Source: Created by Author)
The data flow diagram is a level one data flow diagram. The diagram has only one
external entity called sender. The sender is the only person who interacts with the application
instance. The recipient is a virtual entity. The sender details are stored in application instance
which can be used for authenticating the user. Then the sender selects the recipient for the

5SOFTWARE ENGINEERING METHODOLOGIES
transfer. The recipient data can either be saved in the application or it can be new. If the recipient
data is not saved then the sender have to enter it manually. The sender will complete the transfer
and transfer related data will be stored in the database.
Control Specifications:
Figure 3: State Machine Diagram of Bank File Transfer Application
(Source: Created by Author)
Process Activated
Control action
Recognize
Sender
Show
Recipient
Details
New
Recipient
SMS
verification
Authenticate user 1 0 0 0
Fetch saved recipient data 0 1 0 0
Store new recipient 1 0 1 0
Verify SMS 0 0 1 1
Complete transfer 0 0 0 0
Data Dictionary:
Table: Sender

6SOFTWARE ENGINEERING METHODOLOGIES
Attribute Data
Type
Length Description Primary
Key
Foreign
Key
user_id Int 11 The unique key of the table
which allows finding rows
individually
Yes No
name Varchar 200 The full name of the sender No No
address Varchar 200 The residential address of
the user
No No
contact Int 10 The contact number without
state code
No No
email Varchar 200 The email address of user to
which emails can be sent
No No
password Varchar 200 Password for authentication No No
Table: Account
Attribute Data
Type
Length Description Primary
Key
Foreign
Key
account_number Int 11 The unique key of the
table which allows
finding rows
individually
Yes No
user_id Int 11 Reference to the
sender entity primary
No Yes

7SOFTWARE ENGINEERING METHODOLOGIES
key
branch Varchar 200 The name of the
branch within which
the bank account was
opened
No No
bank Int 10 Name of the bank in
which the account was
opened
No No
balance Varchar 200 The current balance of
the account
No No
signature Varchar 200 Digital signature of
the sender
No No
net_banking_password Varchar 200 Password for
authentication of net-
banking facility
No No
Table: Recipient
Attribute Data
Type
Length Description Primar
y Key
Foreign
Key
recipient_id Int 11 The unique key of the
table which allows finding
rows individually
Yes No
account_numbe Int 11 Reference to the account No Yes

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r entity primary key
name Varchar 200 The full name of the
recipient
No No
contact Int 10 The contact number
without state code
No No
Table: Transfer
Attribute Data
Type
Length Description Primary
Key
Foreign
Key
transfer_id Int 11 The unique key of the
table which allows
finding rows
individually
Yes No
user_id Int 11 Reference to the
sender entity primary
key
No Yes
recipient_id Int 11 Reference to the
recipient entity
primary key
No Yes
branch Varchar 200 The name of the
branch within which
the bank account was
opened
No No

9SOFTWARE ENGINEERING METHODOLOGIES
amount decimal 10,2 Amount of fund to be
transferred in the
transaction
No No
Conclusion:
From the above study it can be concluded that this application can be a very effective
way of handling money transfer. The bank will be able to monitor and control the flow of
transfer. As the money will be transferred through digital medium, there is no need to flow cash
physically. The processing time for fund transfer can be significantly low. The database model
has been created by focusing on the very specific process of fund transfer. No data other than
essential has been considered in the proposed models.

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Bibliography:
[1] Al-Masree, H.K, ‘Extracting Entity Relationship Diagram (ERD) from relational database
schema’, International Journal of Database Theory and Application, 8(3), pp.15-26, 2015.
[2] Dennis, A., Wixom, B.H. and Roth, R.M, ‘Systems analysis and design’. John wiley & sons,
2018.
[3] Yanushkevich, S.N., Miller, D.M., Shmerko, V.P. and Stankovic, R.S, ‘Decision diagram
techniques for micro-and nanoelectronic design handbook’, CRC Press, 2018.
[4] Damjan, P. and Vatanawood, W, ‘Translating UML state machine diagram into Promela’,
In Proceedings of the International MultiConference of Engineers and Computer Scientists, Vol.
1, 2017.