🔍 Analysis tools

The 80/20 rule (Pareto)

A small share of causes drives most of the result.

Often around 20% of customers, products or problems account for about 80% of revenue, cost or complaints.

Finding that 20% tells you where to focus first.

🧮 Example

A distributor finds 15% of its SKUs generate 78% of profit → cut or reprice the long tail.

🎯 Interview tip

Prioritise out loud: “I'd start with the top 3 customers, who are 60% of revenue.”

Used in

Learn next

Operations framework

Fixing a process: capacity, speed, quality, cost.

Hypothesis-driven thinking

Start with a guess, then test it.

The Case Flex weekly

One concept. One case breakdown. One practice prompt. Every week, in simple words.

An AI interviewer runs you through a case, pushes back, and scores your reasoning. Free to start.