Your client is a Philippine BPO company that has experienced a 15% decline in profit margins over the last two years, despite growing revenues. What could be driving this decline, and how would you go about identifying the root causes?

Why This Is Asked
Profitability cases are a staple in McKinsey interviews because they test your skill in isolating root causes from symptoms. The Manila office's work with BPO and service firms makes this a realistic scenario for local candidates.
General Approach
Start by clarifying whether the margin decline is due to cost increases, price decreases, or both. Use a profit framework, then drill down into the most impactful levers with hypotheses and data requests. Be sure to ask about the client's competitive position and operational metrics like seat utilization and attrition.
Sample STAR Answer▾
Situation
During a consulting bootcamp case competition, my team was given a similar scenario with a local logistics provider suffering margin erosion.
Task
I was responsible for leading the quantitative analysis and synthesizing our recommendations.
Action
I structured our approach around a profit tree, breaking down costs into fixed vs. variable and revenue into price vs. volume. I hypothesized that rising employee attrition was increasing recruitment and training costs, while client price concessions to retain business were compressing revenue per FTE. We tested these using limited data: we calculated the cost-per-hire from HR metrics, estimated training time loss from agent ramp-up curves, and compared bill rates from recent contracts. We also segmented the client base by profitability and found that 30% of clients were on legacy contracts with margins below target.
Result
Our analysis pinpointed a 12% point margin leakage from high-turnover low-productivity accounts. Our recommended three-pronged strategy, renegotiate out-of-scope work, invest in predictive attrition analytics, and exit the bottom-quartile clients, was judged the most actionable by the partner panel, earning my team first place.
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- •STAR Structure
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- •Ownership Language
- •PH Workplace Context
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