Life Cycle Assessment (LCA) is a comprehensive method to evaluate the potential environmental and social impacts of goods, services and organizations. It can be used to influence human behavior and improve environmental outcomes through management and engineering decisions, public policy and purchasing decisions. Life Cycle Assessment professionals, who perform and review life cycle assessments, provide life cycle data, and develop and review life cycle tools and models, therefore have great responsibility to provide unbiased, accurate and transparent data and analyses to the greatest extent possible. In doing so they help build a more sustainable world, and support the strength and quality of the LCA profession.

The American Center for Life Cycle Assessment (ACLCA) supports adherence to this code of ethics. All members of the American Center for Life Cycle Assessment shall make the following commitments:

1. To use national and international standards, particularly the ISO 14040 series.
2. To avoid real or perceived conflicts of interest whenever possible, and to disclose them to affected parties when they do exist.
3. To treat fairly all persons regardless of such factors as race, religion, gender and sexual orientation, disability, age, or national origin.
4. To be honest and realistic in stating claims or estimates.
5. To the greatest extent consistent with retaining confidential business information, to disclose data and estimates in a full and transparent manner.
6. To clearly communicate value judgements and assumptions when developing, performing and using life cycle assessments.
7. To improve the understanding among LCA professionals, the general public and decision-makers of Life Cycle Assessment, its appropriate application, limitations and potential consequences.
8. To maintain and improve one's technical competence and to undertake tasks for others only if qualified by training or experience, or after full disclosure of pertinent limitations.
9. To include appropriate subject matter experts on projects and reviews.
10. To seek, accept, and offer honest criticism of technical work, to acknowledge and correct errors, and to credit properly the contributions of others.
11. To assist colleagues and co-workers in their professional development and to support them in following this code of ethics.