MECE
MECE (Mutually Exclusive, Collectively Exhaustive) is a problem-structuring principle developed at McKinsey & Company that ensures all components of a problem are covered without overlap. Mutually Exclusive means no duplication between categories; Collectively Exhaustive means nothing is left out. MECE structures produce clear, complete, non-redundant analyses — the foundation of consulting problem-solving and a critical discipline for any complex analysis.