What changed in revenue, cost or mix?
Consulting case studio · Practice-first
Think clearly under pressure.
A modern preparation system for turning ambiguous business problems into structured analysis, defensible insight and executive-level recommendations.
Core loop
Scope → Structure → Synthesize
North star
Quality over case count
01 / Preparation system
Train the process, not the template.
Frameworks are scaffolding. Strong candidates clarify the question, build a situation-specific structure, follow the evidence and communicate the implication. The loop below turns that behavior into a repeatable habit.
- 01
Stage 01
Learn the interview
Understand what interviewers assess: problem structuring, analytical thinking, synthesis and persuasive communication.
- 02
Stage 02
Build reusable muscles
Practice issue trees, business arithmetic, chart reading and top-down communication before adding case complexity.
- 03
Stage 03
Run deliberate cases
Use live mocks, rotate industries and capture precise feedback—not just the number of cases completed.
- 04
Stage 04
Reflect and repeat
Review patterns in your case log, isolate one improvement area and test it in the next interview simulation.
02 / Interactive practice lab
Rehearse the moments that matter.
Switch between structuring, quantitative reasoning and synthesis. After a live case, use the reflection checklist to convert feedback into your next practice goal.
Practice mode · Structure
Turn ambiguity into a clean issue tree
Your client is a premium coffee chain. Revenue is growing, but profit has fallen for three consecutive quarters. Where would you begin?
- 1Confirm the objective, time horizon and geography
- 2Separate revenue and cost drivers before forming hypotheses
- 3Prioritize the branch most likely to explain the decline
- 4State what data would validate or reject the hypothesis
03 / Case architecture
Recognize the family. Build for the situation.
These common families help you orient quickly. They should guide the first question, never replace judgment.
Is the market attractive, accessible and winnable?
Where can value expand—and what must be true?
What is the value, willingness to pay and strategic response?
Is the asset attractive, synergistic and executable?
Can you create structure when no familiar template fits?
Guesstimate operating system
Assumptions are visible. Logic is auditable.
- 01
Define
Clarify the metric, geography and time period.
- 02
Decompose
Choose a demand-side or supply-side equation.
- 03
Estimate
Use explicit assumptions and rounded arithmetic.
- 04
Sanity-check
Triangulate, interpret and state the sensitivity.
04 / Interview fluency
Four capabilities. One coherent conversation.
Problem framing
Clarify the decision, objective and constraints.
Structured analysis
Break the problem into answerable branches.
Evidence & insight
Calculate, interpret and update the hypothesis.
Executive synthesis
Recommend, support, de-risk and define next steps.
05 / Industry fluency
Learn value chains, not trivia.
For each sector, know how value is created, what drives revenue and cost, which metrics matter, and where disruption changes the economics.
- Consumer & retail
- Financial services
- Healthcare & pharma
- Technology & AI
- Industrial & logistics
- Energy & infrastructure
Source & further study
Go deeper with the original casebook.
This learning experience is an original adaptation informed by the structure of the ISB Consulting Club's Consulting Prep Casebook 2025. The source contains detailed frameworks, practice cases, guesstimates and industry primers. Copyright remains with its respective owner.
Read the 2025 casebook (opens in a new tab)