Systems Life cycles

Following  structured lifecycle can reduce the risk of projects failing. When projects fail....at best the is a lot of money, at worst people loose their lives.

There are 5 phases of the lifecycle;

Analysis
Why???
- New business opportunities
- New laws
- Mergers
- New technology etc.

Design
The design phase is used to create a specification for a system that will meet the need identified in the analysis

Included is;
- Hardware
- Software
- Data
- Buildings?
implementation
- Build the system
- Hardware racking
- Software install
- Data migration
- Training
- Documentation

Testing
- Verify (have we built the thing right)
- Test part on their own
- Test the whole
- Test the people

Evaluation

Used for:
- Validate (have we built the right thing)
- Check it's effectiveness
- Identify future work

After
Maintenance, where we;
- Fix/detect problems
- Adapt the system over time
- Add new features
- Which can cause the whole cycle to be used again for big changes.