MECE: is any framework ever MECE, really?

Question

Hi!

I am prepping for McKinsey first round and struggle with building a framework that is MECE. To me, there always seems to either 1) be an overlap between buckets - so not mutually exclusive 2) something missing - so not collectively exhaustive (there are endless factors to consider for any problem, no?)

Could you give me feedback based on this Case and my framework and let me know if I am misunderstanding something about MECE?

The case:

Shops Corporation is a US-based retail company that is committed to ensuring that its own employees—especially those at their corporate headquarters—represent its customers. The majority of Shops Corporation’s customers are women, while only about a quarter of their executive team is women. The CEO has shared the following with your team:

• Companies in the top-quartile for gender diversity on executive teams are more likely to outperform on profitability.

• Companies in the top-quartile for ethnic/cultural diversity on executive teams are more likely to have industry-leading profitability.

For these and other reasons, Shops Corporation would like to improve diversity, equity, and inclusion throughout their organization. In particular, they are dedicated to enhancing the representation of women and other minority employees within senior leadership.

Shops Corporation has recently created full-time, director-level roles to lead a number of inclusive affinity groups and has engaged McKinsey to help Shops Corporation with their diversity and inclusion goals.

What types of factors would you want to explore to understand how Shops Corporation might improve its diversity within senior leadership?

My framework:

Hiring
- % of men and women who apply, per role, per region (demand)
- % of men and women we accept, per role, per region (supply)
- average qualifications of those who apply, per gender, per role, per region
- what are these numbers for our competitors?

Retention
- % of men and women who quit, per role, per timeframe (demand)
- here, where do post people go after they quit? why?
- % of men and women we lay off, per role, per timeframe (supply)
- what are these numbers for our competitors?

Promotion
- % of men and women who we actually end up promoting per role (those who accept the offer) (demand)
- % of men and women we offer to promote per role (supply)
- what are these numbers for our competitors?

Working conditions
- salaries per gender per role
- maternity and paternity leave conditions
- here, how does our maternity/paternity policy compare to competitors and the norm in the region?
- employee satisfaction per gender
- what are these numbers for our competitors?

- these were all internal, assuming the problem is the client. What if this is the norm in the region or industry? So I'd look at one last bucket: external-

External
- men to women employee ratios in the region per position
- men to women employee ratios in the industry per position

To me, this framework seems messy because there are overlaps.
- For example, my "External" bucket partially overlaps with my "Hiring" bucket bullet point 1. This is because, perhaps, more men than women apply to OUR company because more men than women apply to MOST companies.
- Also, "Retention" and "Working conditions" are connected too. Perhaps we do not retain women as much as men because women experience worse working conditions and, therefore, quit.
- Lastly, my bucket "External" is too big\general compared to my other buckets that are more precise.

If I do use "External", perhaps a more organized approach would be to have two huge buckets: External (here, my "External" bucket would be included) and Internal (here, "Hiring", "Retention", "Promotion", "Working conditions" would be included)

However, this would make my framework 3-tiered and imbalanced (only one bucket in External, but four buckets in Internal)

What am I misunderstanding about frameworks and MECE? How can I change this specific framework to be a good solution?

Answer 1

Kristina,

It would be impossible for me to give you great feedback with only a typed, high-level structure (as opposed to hearing you present it).

But

You are absolutely right, in a sense, no structure is absolutely MECE.

Some structures can be MECE on the first level e.g., the overused 'internal/external' structure. But then once you get into the nitty-gritty of the bullet points, you sometimes have areas that would apply in more than one place.

My advice?

Don't obsess over it.

The point is to make your structure as MECE as you can.

But more important is to build a structure that is genuinely useful and tailored to the client's situation. That is what the interviewers are looking for.

If you need any help, do reach out.

Best,
Cristian

Answer 2

Hi Kristina, the goal is to be as MECE as possible esp. at the first level of structuring. At the second level, you might have variables that influence each other in some aspect but even so, they should be communicated with clarity and structure.

In this example, you could structure using your first three buckets (how we hire, how we retain, and how we promote) + something about firm-wide accountability/incentives (how we incentivise and embed right behaviours in the day-to-day). You can voice over the fact that across each of these three areas, you will do a market-level and company-level analysis. Specifically, within hiring you would look at demand and supply.....and so on.

Happy to discuss in detail and support you with getting more comfort with structuring.

Answer 3

Hey Kristina!

You’re actually thinking about this in a very mature way. The key shift is this: MECE applies to your top level logic, not to every single bullet underneath. Real life is interconnected, and that’s fine.

For this case, a cleaner structure would be something like: representation funnel, policies and processes, and external talent market. The representation funnel covers hiring, promotion, and retention as one end to end pipeline. Policies and processes covers evaluation criteria, compensation, parental leave, culture, bias, sponsorship. External talent market covers industry and regional supply constraints.

Now your buckets are mutually exclusive at the top level. Of course retention is influenced by working conditions, but that is causal logic across buckets, not overlap in structure. That is completely acceptable.

Also, MECE does not mean collectively exhaustive in an absolute sense. It means exhaustive relative to the problem hypothesis. You just need to cover the main drivers that explain senior leadership representation, not every imaginable factor.

Alessa

Answer 4

You’ve hit on one of the most common, and frankly, hardest parts of building a framework – the pursuit of perfect MECE. It’s an ideal, not always a literal reality, especially in the compressed timeframe of an interview. The interviewer isn't looking for academic purity as much as a structured, logical way to break down the problem so you can investigate it systematically. Overlaps often represent interdependencies that you’d want to explore, not necessarily a failure of the framework itself. Your job is to make those connections explicit when you walk through it.

For a problem like this, focusing on the talent lifecycle is a very common and effective MECE approach. Think about the entire journey: how do women get into the organization, how are they developed and retained, and how are they promoted into senior leadership?

1. Attraction/Recruitment: Are enough qualified women entering the pipeline?

2. Development/Retention: Once they're in, are they supported, growing, and staying? (This is where your "Working Conditions" fits in nicely, as a key driver of retention and development).

3. Promotion/Advancement: Are they getting the opportunities to move into senior roles?

Your "External" bucket is critical and you’re right to include it. Rather than making it a separate, potentially imbalanced bucket at the same level as internal process steps, consider it as an important lens or context that overlays each stage of the internal lifecycle. For instance, in "Attraction," you'd ask: what's the external talent pool like? In "Retention," how do our policies compare externally? This avoids the overlap problem and integrates external realities naturally.

Your existing buckets for Hiring, Retention, and Promotion are strong starting points, so you're definitely on the right track. Refine "Working Conditions" to explicitly cover the internal environment influencing development and retention. This shift in perspective allows you to maintain structure while acknowledging the real-world complexities and causal links without trying to force every single factor into a perfectly isolated box.

Hope it helps!

Answer 5

No framework is ever perfectly MECE. Not in interviews, not in real consulting work. Stop trying to make it perfect.

What interviewers are actually checking is whether your thinking is organized and covers the right areas. A small overlap between buckets is fine. Listing the same thing twice under different headings is not.

Your framework is solid. Hiring, retention, promotion, and working conditions cover the full employee lifecycle, which is exactly the right way to look at a diversity problem.

The only thing I would change is the external bucket. Cut it as a standalone category. You are already benchmarking against competitors inside each bucket. That covers the external angle without creating an awkward fifth bucket that does not match the others.

The bigger mistake most candidates make is spending too long perfecting the structure before they start. Build something logical, say it clearly, and move into the analysis. What you do after the framework matters more than the framework itself.