Clinical and Laboratory Standards Institute document H26-P2--Validation, Verification, and Quality Assurance of Automated Hematology Analyzers; Proposed Standard--Second Edition provides guidance for the validation, verification, calibration, quality assurance (QA), and quality control (QC) of automated multichannel hematology analyzers. The intended audience includes manufacturers of such devices, end-user clinical laboratories, accrediting organizations, and regulatory bodies.