1. Systems Analysis and Design
Entity Life Histories

2. (SSADM) Data Views
System Data
Function
Structure
DFD
LDS
Sequence
ELH

3. Sequence
Entity Name
Event C
Event A
Event B

4. Selection
Employee
Event D
New Employee
Event E
New Staff Recruited
New Trainee Accepted

5. Iteration
Employee
Employee Life
New Employee
Event E
Salary Payment

6. Bank Account Entity
Bank Account
Account Deletion
Account Opened
Account Closure
Account Life
Transaction
Pay Deposit
Direct Deposit
Cheque Cashed

7. Employee Entity
Employee
Main Life
New Employee
Possible Ends
New Trainee Accepted
Salary Payment
Employee Resigns
Employee Fired
New Staff Recruited

8. State Indicators
Entity
Account Life
Account Closure
Account Deletion
Birth Event
-/1
1/2
2/3
3/4
State Indicator Format:
valid previous values/value set by event

9. Bank Account Entity
Bank Account
Account Deletion
Account Opened
Account Closure
Account Life
-/1
1,2,3,4/5
5/-
Transaction
Pay Deposit
Direct Deposit
Cheque Cashed
1,2,3,4/2
1,2,3,4/3
1,2,3,4/4

10. Bank Account Entity Bank Account Account Deletion Account Opened
Account Closure
Account Life
-/1
1,2,3,4/5
5/- 1 5 6
Transaction
Operations List
Create record with account details
Add transaction amount to current balance – code a
Add transaction amount to current balance – code b
Subtract transaction amount from current balance
Replace account status by ‘N’
Delete account record
Pay Deposit
Direct Deposit
Cheque Cashed
1,2,3,4/2
1,2,3,4/3
1,2,3,4/4 2 3 4

11. Following the opening of a bank account, a number of transactions may occur. These can be a deposit over the counter, a transfer from another
account or a cheque withdrawal. The account must be closed before it can
be deleted.
Draw an entity life history (ELH) diagram to reflect the above sequence of events. Include status indicators and an operations list.

12. ENTITY – EVENT MATRIX
Order > 12 months old
Order Received
Payment Received
Goods Despatched
etc …
Create
Order
Delete
Modify
Customer
Modify
Create
Invoice
Create
Payment
etc …