Planning your practice week

Start with a diagnostic you can learn from

Before planning a large number of cases, attempt one unfamiliar prompt, a short set of calculations and a personal-experience question. Record where the work breaks down. Did you misunderstand the objective, build overlapping branches, request data without a purpose, make a unit error or struggle to explain your own contribution? Each problem calls for a different kind of practice.

Separate familiarity from performance. Recognising an explanation after revealing it is easier than generating the next step alone. For a useful diagnostic, commit to an answer before reading the worked response. If you need a hint, record when you used it. A supported attempt can still teach you something, provided you do not treat it as evidence that the same step is already fluent.

Practise both ways a case can move

CaseMentor offers interviewer-led and candidate-led practice. In the first, the questions move you through the analysis. In the second, you choose the next investigation. These are practice formats; real interviews can mix elements of both. Do not assume a firm name guarantees an identical sequence across roles, offices and interviewers.

In either format, practise clarifying the objective, structuring the problem, interpreting evidence and making a recommendation. For interviewer-led practice, focus on answering the specific question while keeping the overall objective in view. For candidate-led practice, explain why the information you request is the most useful next step. Ask your recruiter which assessments and interview formats apply to your actual role.

Official guidance also matters for the personal interview. McKinsey describes personal experience and problem-solving interviews for most client-facing roles, with details confirmed by the recruiter. Bain similarly says interviews are tailored to the role. The source links below are a better place to verify current process details than a generic preparation timetable.

Give each session a purpose

Use the example week below as a starting point for your own schedule. Adjust the time to your commitments and interview date. The sessions progress from identifying a weakness to focused practice and testing it in a new case. Leave room to revisit an error after a gap rather than filling every session with new material.

Use your background without letting it hide gaps

Undergraduates can draw on coursework, societies, internships and paid work for personal examples. MBA candidates may need to make a career transition intelligible while refreshing the basics of case analysis. Advanced degree candidates can practise translating technical findings into decisions for a non-specialist listener. Experienced hires should connect the scope of their own work with the role they are pursuing, while avoiding assumptions that specialist knowledge replaces case reasoning.

Assess these needs through practice rather than inferring them from a candidate's background. A researcher may already be commercially fluent; an experienced manager may need substantial practice with mental arithmetic. Let observed performance determine the allocation of time. Keep the same standard for explaining assumptions, using evidence and distinguishing personal contribution from a team result.

Review progress with evidence

At the end of the week, compare recent attempts with your initial diagnostic. Check whether you state the decision before drawing a structure, use the right units in contribution calculations and explain how an exhibit changes your recommendation. Use fresh questions so you can judge whether the skill transfers to an unfamiliar problem.

Record a specific next action, such as "Complete three new price-volume threshold questions and explain the result aloud." Avoid labels such as "be more commercial" without defining the behaviour. Increase case difficulty when the basic steps remain reliable in a full conversation. If a weakness keeps recurring, make the practice narrower and get feedback on the exact moment you lose the thread.