Describe four factors affecting the quality of an information system

What will be an ideal response?

Any four of the following factors will be correct answer:
Correctness: An information system will be accepted by the users only if it meets their needs and requirements correctly.
Reliability: An information system is more reliable if its output is predictable within an acceptable range.
Availability: An information system should be available to the users when they need it.
Security: An information system must be secure against unauthorized access.
Robustness: An information system must resist mishandling and negligent operation.
Efficiency: An information system must carry its tasks with the maximum speed and a minimum amount of resources.
Flexibility: Within predictable parameters, an information system must accommodate changes in its environment and in business needs.
Maintainability: When an existing system cannot cope with changes or displays a behavior that was wrong from the start, then it must be repaired.