Exercise

1
Exercise

• Develop a context Diagram for a small bank for
  Loan Granting process
• Identify EXTERNAL entities
• Develop a Context diagram

2
Context Diagram I-P-O

• Steps
• INPUT
• Customer requests loan through an Application
  (input)
• Credit Bureau provides customer credit history
  (input)
• Customer acceptance of loan (if accepted)
• Customer provides completed (Executed) Loan
  Contract
• PROCESS Process Loan
• OUTPUT
• Outcome Accept/Reject
• IF Loan is approved
• Send acceptance notification
• IF accepted by customer
• Send Loan Contract
• Send Loan Amount
• ELSE
• Stop

3

Customers Credit History
Credit Bureaus
Loan Granting Process
Application
Executed Loan Contract
Acceptance/ Rejection of Loan
Notice of Acceptance or Rejection
Customer
Loan Contract
Loan Funds
4

• Assume following processes (data Fragments) at
  level 0 for the Loan Granting Process
• Application Process
• Loan Process
• Execute Loan
• Loan Delivery
• Explode the context diagram for level 0 for the
  above processes

5

• 1.0 Application Process
• INPUT
• from Context diagram .Customer .APPLICATION
• PROCESS
• Check for applications completeness
• OUTPUT
• Completed Application
• 2.0 Loan Process
• INPUT
• from context diagram customer credit History
• From Bank CUSTOMER database customers history
  with the bank
• Completed Application
• Bank rules from RULE database regarding banks
  policy on loans
• PROCESS
• Based on banks rule decide if customer meets
  requirements for loan

6
Application
1.0 Application Process
Bank Rules
Customers Credit History
Completed Application
Credit Bureaus
Banks Rules
2.0 Loan Process
Customer
History
Customer Database
Notice of Acceptance or Rejection
Update Customer
Acceptance or Rejection of Loan
Customer
Loan Completed
3.0 Execute Loan
Loan Contract
4.0 Loan Delivery
Loan Funds
Executed Loan Contract