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Boston Consulting Group·Data Scientist·Online Assessment (OA)·Senior

Senior
Jun 2026

Summary

BCG Data Scientist case interview, timed online format. You get a fashion company profit decline scenario, work through exhibits, and then record a one-minute video summary for a fake executive audience. The video part is the part nobody warns you about.

Questions Asked (2)

Q1

A fashion company's profits have dropped. Using the provided exhibits, identify the main drivers of the decline (price, volume, mix, cost, or some combination) and propose two or three concrete, data-backed initiatives to turn things around.

Root Cause AnalysisProduct Analytics & MetricsProduct Strategy
Author's notes

The exhibits do most of the heavy lifting if you read them carefully, but I wasted time trying to be clever instead of just quantifying what was obviously the biggest driver first.

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AI HintsAI Generated

Suggested Approach

Start by decomposing the profit decline into price, volume, mix, and cost effects using the exhibits, then quantify each driver's contribution to prioritize the biggest levers. Next, link the drivers to root causes (e.g., discounting, product mix shift, supply chain costs) and propose data-backed initiatives that directly address them, with expected impact estimates.

Pro tip: Always quantify the impact of each driver and initiative in dollar terms or percentages, and state your assumptions clearly—this shows you can translate analysis into business value, which is critical for a data scientist at BCG.

1. Decompose profit change

Use the exhibits to break down the profit decline into price, volume, mix, and cost components. Calculate the contribution of each factor to the total change.

2. Identify primary drivers

Determine which factors are the main drivers by comparing their relative impact. Look for patterns such as declining average selling price, volume drop in key segments, or rising COGS.

3. Link drivers to root causes

Connect the quantitative drivers to potential root causes using the data (e.g., increased discounting, shift in product mix toward lower-margin items, supply chain disruptions).

4. Propose data-backed initiatives

Develop 2-3 concrete initiatives that address the root causes, supported by data from the exhibits. Estimate the expected impact of each initiative.

5. Prioritize and summarize

Rank initiatives by impact and feasibility, and summarize how they will reverse the profit decline. Recommend next steps for validation.

Key Points to Mention

  • Profit decomposition into price, volume, mix, and cost effects using the exhibits
  • Quantification of each driver's contribution to the profit decline (e.g., price erosion accounted for X% of decline)
  • Root cause analysis linking drivers to business issues (e.g., increased promotional activity, shift to lower-margin products)
  • Data-backed initiatives such as optimizing pricing strategy, adjusting product mix, or renegotiating supplier contracts
  • Expected impact and feasibility of each initiative, with clear assumptions
  • Use of data visualization or sensitivity analysis to support recommendations

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.

Q2

Record a 60-second video executive summary of your findings and recommendations, as if presenting to senior leadership.

Adaptability & AmbiguityStakeholder Management
Author's notes

Nobody told me there was a video component until I was already in the assessment.

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AI HintsAI Generated

Suggested Approach

Structure your 60-second video as a crisp executive summary: start with the business context and your key finding, then present 2-3 prioritized recommendations with expected impact, and close with a clear next step. Speak as if you're advising a time-pressed senior partner—lead with the 'so what,' avoid technical jargon, and quantify impact where possible.

Pro tip: Open with a one-sentence 'headline' that captures your entire message (e.g., 'Our analysis shows X, so I recommend Y to capture $Z in value'), because senior leaders often decide in the first 10 seconds whether to keep listening.

1. Set the context and headline

In 1-2 sentences, state the business problem and your single most important finding or recommendation. This frames everything that follows and respects the executive's time.

2. Summarize the key evidence

Briefly mention the data, methodology, or analysis that supports your finding, but only at a high level—focus on what it means, not how you did it.

3. Present prioritized recommendations

Give 2-3 actionable recommendations ranked by impact and feasibility. For each, state the expected business outcome (e.g., revenue lift, cost savings, risk reduction).

4. Address risks and assumptions

Acknowledge 1-2 key uncertainties or dependencies and how you would mitigate them, showing you've thought critically about implementation.

5. Close with a clear next step

End with a specific ask or proposed next action (e.g., 'I recommend we pilot this in Q3 with the marketing team') to drive decision-making.

Key Points to Mention

  • Quantified business impact (e.g., potential revenue increase, cost reduction, or efficiency gain)
  • Prioritization rationale (e.g., impact vs. effort, alignment with strategic goals)
  • Key assumptions and how they were validated or could be tested
  • Risks or limitations and mitigation strategies
  • Clear, actionable next steps with owners and timelines
  • Concise, jargon-free language tailored to a non-technical executive audience

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.