1. Summary: The Systems Development Life Cycle
Business Administration Session 3 Notes
Summary: The Systems Development Life Cycle
Can Be ‘Circular’ or ‘Iterative’
Usually Both in a Hybrid:
Life Cycle Approach
Iterative Design
Prototyping
End User Developed
Drew Parker September 2001

2. Business Administration 362 2001-3 Session 3 Notes
Postaudit
The Final Stage of Systems Development
Commissioned by Steering Committee
Audit Team Selected
IS Auditor Chairs
Drew Parker September 2001

3. Business Administration 362 2001-3 Session 3 Notes
Postaudit
Major Areas Reviewed:
Quality of the System
user’s responses to the system
performance against original benchmarks and objectives
Drew Parker September 2001

4. Business Administration 362 2001-3 Session 3 Notes
Postaudit
Major Areas Reviewed:
Quality of the Project Management Process
Management, Performance
Quality of the Planning Process
Variances from Planned Performance
Surprises Encountered
Drew Parker September 2001

5. Auditing a Computer Based Application
Business Administration Session 3 Notes
Auditing a Computer Based Application
As a Black Box
Input-Output Analysis
Auditing around a computer based system
Components Analysis
Examination of procedures used in the system
Auditing through a computer based system
Drew Parker September 2001

6. The Maintenance Effort over the Life of a System
Business Administration Session 3 Notes
The Maintenance Effort over the Life of a System
Bug Fixing
Adjust to Accommodate Changing Needs
Environmental Adjustments
Hardware and Software Updates
Cost / Benefit of Replacement Changes
Drew Parker September 2001

7. Categories Leading to Systems Re-evaluation
Business Administration Session 3 Notes
Categories Leading to Systems Re-evaluation
Departmental Management - System Users
Upper Management - Strategic Priorities
Audit Reports - Necessary Allocation of the use of resources
Drew Parker September 2001

8. Categories Leading to Systems Re-evaluation
Business Administration Session 3 Notes
Categories Leading to Systems Re-evaluation
External Sources
government and regulatory bodies
computer vendors - technology offerings
competitive pressures
strategic opportunities
Steering Committee Vetting User Requests
Drew Parker September 2001

9. Maintenance of an Information System
Business Administration Session 3 Notes
Maintenance of an Information System
More Expensive the Development
Duration
Cost of Changes
A Majority of IS Expenditure
Drew Parker September 2001

10. Maintenance of an Information System
Business Administration Session 3 Notes
Maintenance of an Information System
The Majority of Technical Effort Has Been on Development:
to make maintenance easier
object orientation
structured programming
to eliminate the maintenance effort altogether
disposable code
user maintained applications
Drew Parker September 2001

11. Business Administration 362 2001-3 Session 3 Notes
Steps Covered
Preliminary Investigation
Requirements Analysis
Output, Processing, Input Considerations
Programming and Testing
Installation / Implementation
Maintenance
Drew Parker September 2001

12. Tools and Techniques Discussed
Business Administration Session 3 Notes
Tools and Techniques Discussed
Feasibility Analysis
PERT / CPM, GANTT
Use Cases
Data Flow Diagrams
Entity-Relationship Diagrams
Logic Models (Decision Tables/Trees)
UML
Use-Case Diagrams
State Diagrams
Class Diagrams
Drew Parker September 2001