1. SDLC
CS5493

2. SDLC
System Development Life Cycle

3. SDLC Simplified SDLC Analysis (planning) Design Development
Deployment (implementation)
Maintenance (assessment)
Decommission

4. SDLC Analysis – collect data and determine the needs for a new system.
Determine the objectives for the system

5. SDLC
Design
Design a system that can be implemented taking into account
the required objectives,
desired outcomes, and
resources available

6. SDLC Deployment (implementation)
Don't let all that hard work go to waste!
Support from management
Budgeting/purchasing
Training
Publishing
etc

7. SDLC Maintenance (assessment)
Measure if the system meets the objectives
Must work as intended and produce the desired outcomes
There could be unexpected outcomes
Implement a Sustainability Cycle

8. SDLC Decommission Your system may eventually become obsolete
Secure disposal of assets

9. The Sustainability Cycle(loop)

10. The Sustainability Cycle
Establishing a system in-perpetuum.
Analysis (planning)
Design
Development
Deployment (implement)
Maintenance

11. Sustainability Cycle
What makes this different from SDLC?

12. Sustainability Cycle Analysis
Periodic review of the system (6-24 months)
To insure a proper review, someone must be held accountable for the review.

13. Sustainability Cycle re-Design
Those aspects of the original design that
do not produce the desired outcomes, or
produce unexpected negative results
must be re-designed, replaced, decommissioned.

14. Sustainability Cycle
Deployment
implement the changes

15. Sustainability Cycle
Maintenance
Repeat the sustainability cycle

16. SDLC
SDLC can be applied to physical systems, policies & procedures, computer security awareness program (or training), etc.

17. Program, Policies, and Procedures
Implementing a p* has benefits and consequences.
A good p* is expected to produce desired outcomes.
A p* can have undesirable and unexpected consequences.
Use a sustainment cycle to keep it relevant. Periodically review the effectiveness of your p* and be prepared to make changes.

18. Pragmatism
The effectiveness of a policy is dictated by its observable results.
The policy must work as intended and produce the intended outcome.