This issue of Clinics in Laboratory Medicine entitled "Risk, Error and Uncertainty: Laboratory Quality Management in the Age of Metrology” will be guest edited by Sten Westgard, James Westgard, and David Armbruster. The issue will cover a broad range of topics related to management in the laboratory including but not limited to: Metrology Perspectives; Biologic Variation Approach to Daily Laboratory; Clinical Outcome Approach to Goal Setting; Six Sigma Quality Management System; Traceability and Comparability; MU, Risk, and Sigma-metrics at Sunway; and Quality Indicators for the Total Testing Process, among others.