- In information technology, gap analysis is the study of the differences between two different information systems or applications, often for the purpose of determining how to get from one state to a new state. A gap is sometimes spoken of as "the space between where we are and where we want to be." Gap analysis is undertaken as a means of bridging that space. Among the various methodologies used to perform gap analysis is IDEF, a group of methods used to create a model of a system, analyze the model, create a model of a desired version of the system, and to aid in the transition from one to the other.
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