5.1 Moving from Questions to Problems
A client may ask a broad question such as, “How can we grow?” or “Why are profits falling?” Your first task is to convert that question into a problem you can actually analyze.
Useful approach: Clarify the objective, define the relevant scope, and identify the decision the client needs to make.
For example, “How can we grow?” might become: “Which growth opportunities can increase revenue by at least $100 million over the next three years while maintaining current margins?” That version is much easier to structure and solve.
5.2 Separating Symptoms from Root Causes
Business problems often appear first as symptoms. Falling profit, declining market share, longer delivery times, or high employee turnover tell you that something is wrong, but not why.
Your job is to identify the underlying cause.
If profits are falling, for example, possible drivers include lower prices, declining volume, unfavorable product mix, higher input costs, or operational inefficiency.
Key question: “What would have to be causing this outcome?” Keep moving from the observed result toward the underlying drivers until you reach something the client could act on.
5.3 Breaking Complicated Problems into Manageable Pieces
Complex problems become easier when divided into smaller questions. This is the purpose of an issue tree or similar structure.
Suppose a company is considering entering a new market. Instead of trying to answer the entire question at once, you might examine market attractiveness, competitive position, company capabilities, economics, and risks.
Good decomposition: Each branch should represent a distinct question that contributes directly to the overall decision.
Avoid creating long lists simply to appear comprehensive. A useful structure makes the next analytical step clearer.
5.4 Identifying the Key Drivers
Within any business problem, a small number of variables usually have disproportionate influence on the outcome.
For a retail business, profit might depend heavily on customer traffic, conversion rate, average transaction value, and store costs. For an airline, load factor, ticket price, fuel cost, and aircraft utilization may matter more.
Practical habit: Ask which variables have the greatest potential to change the result. Those are usually where you should focus first.
5.5 Distinguishing What Matters from What Does Not
Case interviews often contain more information than you need. Strong candidates separate decision-relevant information from interesting but secondary detail.
When deciding whether something matters, ask:
- Does this affect the client’s objective?
- Could it materially change the recommendation?
- Is the effect likely to be large enough to investigate?
- Can I realistically analyze it with the information available?
Common mistake: Spending several minutes investigating a minor issue simply because the data is available.
5.6 Developing an Initial Point of View
Consultants often begin with an initial point of view based on the information available. This is not a final answer. It is a working hypothesis that helps focus the analysis.
For example: “My initial view is that the profit decline is more likely driven by revenue than cost because the prompt indicates that competitors have recently reduced prices.”
Purpose: A point of view gives you something specific to test. It should accelerate analysis, not lock you into a conclusion.
5.7 Updating Your Thinking as Evidence Arrives
A strong consultant changes course when the facts change. If your initial hypothesis is contradicted by the evidence, update it.
Suppose you initially believe a sales decline is caused by customer loss. New data shows customer numbers are stable but average spending has fallen sharply. Your focus should shift immediately toward pricing, product mix, or purchase frequency.
Strong behavior: Say what changed your view and explain where you would investigate next.
Do not become attached to being right. The purpose of analysis is to improve your answer.
5.8 Balancing Rigor with Speed
Case interviews reward disciplined analysis, but they also impose time limits. You cannot investigate every possible explanation or calculate every number precisely.
Rigor means using sound logic, reasonable assumptions, and appropriate checks. It does not mean doing exhaustive analysis.
Practical rule: Be precise where the answer depends on precision and approximate where an estimate is sufficient.
If a quick calculation shows that an opportunity is too small to matter, there is usually no reason to spend several more minutes refining it.
5.9 Applying the 80/20 Principle
The 80/20 principle is the idea that a relatively small portion of the analysis often produces most of the useful insight. In case interviews, it means identifying the few questions most likely to determine the answer.
If a company is losing $50 million annually, a cost category worth only $1 million may not deserve immediate attention. A pricing change affecting hundreds of millions in revenue probably does.
80/20 thinking: Start with magnitude, likelihood, and relevance. Analyze the biggest potential drivers first and go deeper only when the evidence justifies it.
5.10 Knowing When Analysis Is Sufficient to Make a Decision
One of the hardest skills in consulting is knowing when to stop analyzing. More information is almost always available, but additional analysis does not always improve the decision.
You may have enough information when:
- The major drivers have been tested.
- The evidence points consistently toward one conclusion.
- Remaining uncertainties are unlikely to change the recommendation.
- The next analysis would add little incremental insight.
Decision standard: Aim for enough evidence to make a defensible recommendation, not perfect certainty.
Thinking like a consultant ultimately means staying focused on the decision. Define the real problem, identify its major drivers, test the most important explanations, and stop when the evidence is strong enough to act.
