What is meant by interoperability?
In its simplest sense, interoperability means the ability to take questions out of one system and re-use them in another. This is more important than sounds. The initial investment in creating an item bank can be large it takes a lot of time and money to create a large number of high quality items so its important that this investment is not lost if/when the supplier of the e-assessment system goes bust or you choose to move to a different platform. Emerging standards (such as QTI) aim to ensure that you can export your questions from one system and import them to another.