MECE

MECE (Mutually Exclusive, Collectively Exhaustive) is a framework for breaking down complex problems into manageable components.

Components

Mutually Exclusive: No overlap between categories
Collectively Exhaustive: Covers all aspects of the problem

A bounded set of service requests is partitioned by current status into not started, in progress and closed. Two checks ask whether any request could fit two categories or none. Categories require explicit definitions for exceptions. — Conceptual partition, not a measured distribution. A single classification rule and explicit scope make overlap and missing cases easier to detect. Original diagram based on McKinsey Alumni Center, interview with Barbara Minto, Barbara Minto: MECE: I invented it, so I get to say how to pronounce it.

Usage

Used for breaking down complex problems into distinct, comprehensive categories. Particularly useful in strategy consulting and problem analysis.

Examples and Applications

Problem Structuring: Organize issues into clear categories
Strategic Analysis: Break down market segments or customer types
Decision Trees: Create comprehensive option sets
See also: 5 Whys, SWOT, Frameworks