Candidates who want to train the case on their own, and candidates who learned casing in the candidate-led format and need to adjust to McKinsey's.
McKinsey's case is usually interviewer-led: the interviewer asks a sequence of questions, and each answer is assessed. Most preparation material trains the candidate-led format, whose habits often have to be unlearned. McKinsey Case Ready builds the problem-solving capabilities McKinsey seeks, one at a time.