Once the system has been put into action its progress will have to be monitored to see if what it is actually happening matches what should be happening:
Periodically systems are reviewed to give an overall picture of the progress made. The findings of the review can then be incorporated into subsequent systems analysis which, in theory, should be better because of the knowledge and experienced gained. This will help provide feedback information for the next round of decisions.
Success criteria might include whether the system produces accurate, relevant and up to date information at a cost-effective price.
In summary, if the objective of systems analysis is to develop a better system, "is the 'right' information getting to the right person at the right time in the right place?". If so we have the basis for better decision making and a successful organisation.
