22.1 Why Interviewers Ask Brainstorming Questions
Consulting problems often require more than analyzing existing data. Teams must also generate possible solutions, hypotheses, and alternatives.
Brainstorming questions therefore test whether you can:
- Create structure: Organize an open-ended problem.
- Generate ideas: Produce multiple plausible options.
- Think beyond the obvious: Develop additional possibilities after the first ideas appear.
- Exercise judgment: Distinguish realistic ideas from weak ones.
Key point: Interviewers usually care about the quality and organization of your thinking, not simply the number of ideas you produce.
22.2 Structuring Before Brainstorming
Do not immediately start listing ideas. Take a short pause and create two or three useful categories first.
Suppose the client wants to increase revenue. You might organize ideas around:
- Existing customers: Increase frequency, quantity, or spending.
- New customers: Acquire additional customer segments.
- New offerings: Introduce products or services.
This makes your answer easier to follow and helps you generate more ideas without repeating yourself.
Good habit: State the categories before filling them with ideas.
22.3 Generating Ideas Systematically
Once you have categories, work through them one at a time.
If a retailer wants to attract more customers, for example, you might consider marketing, pricing, product assortment, store locations, digital channels, partnerships, and loyalty programs.
Systematic generation is more reliable than waiting for inspiration.
Useful question: “What are the major levers available to the client?”
Then generate ideas beneath each lever.
22.4 Breadth Versus Depth
Good brainstorming requires both breadth and depth.
Breadth: Show that you can identify multiple different types of solutions.
Depth: Show that you can develop promising ideas beyond a one-line label.
For example, saying “use marketing” is too shallow. A stronger idea might be: “Target former customers with personalized offers based on their previous purchase behavior.”
A practical approach is to generate several ideas across categories and then expand the strongest two or three.
22.5 Developing Second-Level Ideas
Your first ideas will often be obvious. Continue one level deeper.
If your first idea is “increase customer retention,” ask how. Possibilities might include improving onboarding, introducing loyalty rewards, resolving service issues faster, or offering personalized renewal incentives.
Second-level thinking: Move from a broad lever to specific actions the client could realistically take.
This is often what separates a generic brainstorm from a useful consulting answer.
22.6 Prioritizing Your Ideas
After generating ideas, identify which ones appear most attractive.
Possible prioritization criteria include:
- Impact: How much value could the idea create?
- Feasibility: Can the client realistically execute it?
- Speed: How quickly could it produce results?
- Cost: How much investment is required?
- Risk: What could go wrong?
Strong response: “Of these options, I would initially prioritize improving retention because the client already has a large customer base and the initiative could generate results faster than geographic expansion.”
22.7 Making Suggestions Practical
Ideas become more credible when you consider implementation.
Instead of saying, “Launch internationally,” explain which market characteristics would make expansion attractive, what capabilities are required, and how the company might enter.
Practical test: Could management understand what action you are actually proposing?
Also consider obvious barriers such as capital, technology, regulation, talent, and customer adoption.
22.8 Creative Thinking Without Random Guessing
Creativity does not mean saying something unusual simply to appear original.
Useful creativity is grounded in the economics and context of the case. A good idea may be familiar but applied in a new way to the client’s situation.
Better approach: Use the client’s customers, assets, capabilities, channels, data, partnerships, and competitors as prompts for generating possibilities.
This produces ideas that are both creative and commercially relevant.
22.9 Common Brainstorming Categories
You should not memorize one universal brainstorming framework, but several categories frequently help:
- Customers: Acquisition, retention, frequency, satisfaction.
- Products: New offerings, features, bundles, customization.
- Pricing: Price changes, tiers, subscriptions, promotions.
- Channels: Direct, digital, retail, distributors, partnerships.
- Geographies: New regions or markets.
- Operations: Productivity, automation, capacity, quality.
- Partnerships: Alliances, suppliers, distributors, acquisitions.
Use these as prompts: Select only the categories relevant to the specific question.
22.10 What to Do When Your Mind Goes Blank
Going blank during a brainstorming question is common. Do not panic and start speaking randomly.
Pause briefly and return to structure. Ask yourself:
- Who are the customers?
- What does the company sell?
- How does it reach customers?
- How does it make money?
- What assets or capabilities could it use?
If necessary, start with one category and build ideas from it. Producing three structured, relevant ideas is better than producing ten disconnected ones.
Final principle: Strong brainstorming is structured creativity. Create categories, generate ideas systematically, push beyond the first obvious answers, and then prioritize based on impact and feasibility. The goal is not to be unpredictable. It is to produce practical options that help the client move forward.
