Explain in brief the operational characteristics of a good software.

Operational characteristics are functionality based factors which are related to 'exterior quality of software', some of the operational characteristics of good software are: Correctness: The software should meet all the specifications stated by the customer. Usability/Learnability: The amount of efforts or time required to learn how to use the software should be less. This makes the software user-friendly even for IT-illiterate people. Integrity: Software should be integrated with other applications and it should not affect the working of another application. Reliability: The software should neither have any defects nor it should fail while execution. Efficiency: The software should make effective use of the storage space and execute command as per desired timing requirements. Security: The software shouldn't have ill effects on data / hardware. Proper measures should be taken to keep data secure from external threats.