Definitions for "Performance Gap"
The difference between the way that learners should perform a task (called desired performance) and the way that they currently do perform that task (called current performance) (Dick & Carey, 1990). Any proposed e-learning solution should have closing the performance gap as its goal.
The delta between desired and actual performance.
The gap between what customers and stakeholders expect and what each process and related sub processes produce in terms of quality, quantity, time, and cost of service and products.