This International Standard describes the principles and framework for life cycle assessment (LCA) including a) the goal and scope definition of the LCA, b) the life cycle inventory analysis (LCI) phase, c) the life cycle impact assessment (LCIA) phase, d) the life cycle interpretation phase, e) reporting and critical review of the LCA, f) limitations of the LCA, g) relationship between the LCA phases, and h) conditions for use of value choices and optional elements. This International Standard covers life cycle assessment (LCA) studies and life cycle inventory (LCI) studies. It does not describe the LCA technique in detail, nor does it specify methodologies for the individual phases of the LCA. The intended application of LCA or LCI results is considered during the goal and scope definition, but the application itself is outside the scope of this International Standard. This International Standard is not intended for contractual or regulatory purposes or registration and certification.