A Model of a Financial Information System

1
A Model of a Financial Information System
Data Information
Output subsystems
Input subsystems
Database
Forecasting subsystem
Accounting information system
Internal sources
Internal audit subsystem
Funds management subsystem
Users
Environmental sources
Financial intelligence subsystem
Control subsystem
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The Escalating Cost of Correcting Design Errors
as the System Life Cycle Progresses
Operation/maintenance
4,000
Relative cost of fixing a defect
1,200
Implementation
500
Integrated testing
Module testing
100
Development
40
Conceptualization
Design
10
Requirements
1