I think the cycle described in Jonassen and Hernandez-Serrano may deserve some explanation apart from Case-based learning as it describes the learning process rather than the design model.
Jonassen, David H. & Julian Hernandez-Serrano, Case-Based Reasoning and Instructional Design: Using Stories to Support Problem Solving ETR&D, Vol. 50, No. 2, 2002, pp. 65-77 ISSN 1042-1629.