How to use this book; Introduction to Chromatography Data Systems; Regulatory Requirements for CDS Validation; Concepts of Computer Validation; CDS Validation: Managing System Risk; Process Redesign to Exploit the Tangible Benefits of Electronic Signatures with a CDS; Writing the User Requirements Specification (URS); Controlling the Work: The Validation Plan; System Selection; Auditing the CDS Vendor; Contract, Purchase Order and Planning the Installation; Risk Assessment and Requirements Traceability; Installation Qualification and Operational Qualification (IQ and OQ); Performance Qualification (PQ) or End User Testing; User Training and System Documentation; IT Support of the System; System Description; Validation Summary Report; Defining Electronic Records for a CDS; Maintaining the Validation Status during Operational Life; Periodic Review of the CDS; Records Retention; CDS Data Migration; CDS System Retirement; Retrospective Validation; References;