Systems Life cycle

There are 5 main factors to the development of a system. These are Analysis, Design, Implementation, Testing and finally the evaluation.
Using this Structure it can significantly reduce the risk of the project failing, it losing money/funding or in bad situations the risk of human fatality.
A new system my be needed because new laws have been introduced or a new business opens.
There are a number topics that need to be addressed for each part of the life cycle.
In Analysis:
Is it feasible
Time needed
Skills needed
Etc

For Design:
Buildings
Data inputs and outputs
Hardware/Software

Implementation:
Build the system
Training
Data migration

Testing:
Test Individual parts
Test as a whole
Test the people operating the system.

Finally the Evaluation:
Does it do what it was built for
Fix any problems
Add any new features to optimize it