Problem Scenarios Definition

Problem Scenarios:

A problem scenario tells a story of current practice. These stories are carefully developed to reveal aspects of the actors and their activities that have implications for design.
Other members of the project team should be able to read the problem scenarios and appreciate the work-related issues that the field study has uncovered.
It is called "problem scenarios" not because they emphasize problematic aspects of current practices, but rather because they describe activities in the problem domain. In Senario Based Design new activities are always grounded in current activities.

"Usability Engineering: Scenario-Based Development of Human Computer Interaction"
by Mary Beth Rosson, John M. Carroll
http://ldt.stanford.edu/~gimiller/Scenario-Based/ProblemScen.htm