Goal Composition: Extending Task Analysis to Predict Things People May Want to Do
http://www.useit.com/papers/goalcomposition.html

Nielsen, Jakob
Alertbox
1994

Abstract:

One of the basic questions during the development of a computer system and its user interface is what the users will want to do with the system. Unfortunately, a task analysis of users' current activities is not sufficient to predict what they will do in the future. It is well known that people's use of computers change over time and that new and unexpected uses are found for most new systems.