Pareto charts tempt teams to chase the long tail too early. For a KRW 120B indirect ledger, the bottom 40% of suppliers might represent only 8% of spend — effort better aimed at the steep portion of the curve first.
We plot cumulative spend against supplier rank, then mark three zones: strategic (top decile), managed (next tier), and tail. Thresholds shift by category — packaging concentrates faster than professional services.
The curve also reveals data quality issues. A flat mid-section often means miscoded intercompany transfers. We pause mapping until those rows are reclassified.
Recommendations reference the curve explicitly: 'Consolidate these fourteen tail vendors in freight forwarding before touching office supplies.' That specificity keeps sourcing sprints bounded.
Revisit the Pareto quarterly. After one consolidation wave, the curve reshapes and the next cut point moves. Static screenshots go stale; living charts do not.