The product baseline is the approved product configuration documentation, sometimes referred to as the "as-built" configuration.
Product configuration documentation is the detailed design documentation including those verifications necessary for accepting product deliveries (first article and acceptance inspections.) Based on program production/procurement strategies, the design information contained in the product configuration documentation can be as simple as identifying a specific part number or as complex as full design disclosure.
The Product Baseline is established after the PCA has verified the documentation.
The System PM establishes/approves the Product Baseline for CI managed by the Government.
The contractor establishes/approves the Product Baseline for CI managed by the contractor.
Terms and Definitions
The Product baseline includes documentation such as:
 Go to Defense Standardization Program Office, ASSIST Database for the most up-to-date and ONLY official version of MIL-HDBK-61A. (http://assist2.daps.dla.mil/quicksearch/)