Case studies are widely used in sustainability work, yet their influence on real project decisions varies across practitioner groups. Manufacturers, engineers, and sustainability consultants often interpret results through entirely different lenses – technical feasibility, carbon performance, client priorities, or broader cultural narratives. This session will highlight how comparative case studies are constructed, communicated, and applied, identifying best practices to ensure clearer messages, objective conclusions and high-impact outcomes. Drawing on interdisciplinary perspectives, participants will unpack how life cycle assessment data is framed, understand its inherent strengths and limitations, and learn to apply it more effectively. The session will also present practical strategies for commissioning, presenting, and leveraging case studies to improve carbon literacy, and support more credible, evidence‑based design choices. Attendees will leave with clear, actionable approaches to interpreting case studies, ultimately enabling teams to drive measurable, low‑carbon outcomes with confidence