Structuring
Issue tree and MECE
Last reviewedWhat is Issue tree and MECE?
The master tool: break a problem into parts that do not overlap and together cover everything, then branch again until each part is something you can look at or calculate.
When should you use Issue tree and MECE?
Every case. It is how you turn a vague question into a clear plan.
What are its limits?
A tree is only as good as its first split. A messy top level breaks everything below it.
How do you tailor it to a case?
Choose the split that fits this problem: by formula (profit = revenue minus cost), by stage in a process, by clear groups, or by a simple yes and no.
Where does it come from?
MECE is usually credited to Barbara Minto at McKinsey.
Use a framework as a source of ideas, then put a structure built for this specific problem on the table. Reciting a framework by name is a common way to lose marks.