[1] The example question is the question we typically teach in class. The example homework solutions we provide to lecturers are answers to these questions.
[2] The case difficulty cube is a simple three-dimensional model of the difficulty of a case. Each dimension is assessed on a 1..3 scale (easy, average, difficult). It is based on the Leenders et al. book [3].
[3] Michiel R. Leenders, Louise A Maufette-Leenders, James A. Erskine. Writing Cases 4th Edition. Ivey Publishing, 2001.