Question

Bank of america

Assignment #1 Develop a set of Data Flow Diagrams (DFD) and ER-D depicting the business processes or activities of an online banking system. The business processes/activities of your online banking system shall be identical to those of an ATM machine.

1. Your DFDs MUST include Context DFD, Level-0 DFD and at least one Level-1 DFD. Your Data Stores must exist to support the business processes.

Answer 1

A data flow diagram is a way of representing the process of data.

Various components of DFD are:

1) processes- these are represented by circle and are used to show the change of input into output

2) flows- represented by arrow, they show the flow of data

3) warehouse- these are used to represent the storage of data, denoted by two horizontal lines

4) terminator- these are external entities that communicate with the system

A DFD is developed by analysts for developers to clarify the end requirements of clients. DFD needs to be consistent with ER-D.

ER-D or Entity relationship diagram depicts the interrelationship of things in a specific domain area. This consists of two parts:

1) entity type- this classifies things

2) specifications- this specifies the relationship between the entity types.

Now let's develop a Data flowvdiaflow and Entity relationship diagram to depict business processes of an online banking system.

We also would discuss about:

1) Zero level DFD- this gives the basis overview of the system. This would include in a nutshell high level process of online banking system.

Various components are:

a) management of bank

b) management of account

c) management of transaction

d) management of customer

e) management of account type

2) First level DFD- this is little deeper than zero level DFD- as it would include subsystems and their interrelationship, external agents, one or more data flow, internal data storage.

Various components are:

a) bank records and report

b) account records and reports

c) transfer records and reports

d) balance records and reports

e) customer records and reports

f) account type records and reports

Accounts Managem Manare Account Details Login to Online Bankine Curnency Generate Report Stem Systems Manag tem Admins Check Credentials Manage User Permission Currency Market DED- Online Bankin 2019-9-28 23:29