The Sigma test ensures RoHS Compliant by verifying that products meet strict environmental standards. RoHS, which stands for Restriction of Hazardous Substances, limits the use of harmful materials such as lead and mercury in electronics. This test rigorously examines components to confirm adherence to RoHS guidelines, ensuring that products are environmentally friendly and safe for consumer use. Compliance with RoHS regulations demonstrates a commitment to sustainability and enhances marketability by meeting global standards for eco-friendly manufacturing.