Progressive scenarios generally include three organizational patterns:

Problem-Solution: There are several variations of this pattern but one of the most effective patterns for a case study is the problem-incorrect solution-correct solution pattern.  The authors outline a problem and then give an incorrect solution to stimulate discussion and then, depending on whether a solution is necessary, the authors may or may not provide a correct solution near the end of the scenario. 

Sequential: This pattern is most effective for case studies that describe leadership and management models such as Problem Solving Models, the Performance Counseling Models, and Team Building Models, to name just a few.  Authors usually describe a model's steps in sequence but they may also choose to describe the steps out of sequence to stimulate discussion.  The steps are often interspersed among other problems and solutions described throughout the case study.

Cause-Effect:  This pattern is effective when you want a case study to demonstrate how courses of actions affect other people and influence situations.  However, this pattern is difficult to pull off because it requires more set up information, thus it is not used as often as the problem-solution and sequential patterns.