Meeting the needs of end-users and involving them throughout the design process are core tenets of good UX. Following UX best practices, Lennox invited a group of its key customers and internal stakeholders to participate in a series of day-long sketching sessions (Design Studios). During these sessions, Tonic3 identified, prioritized and helped facilitate consensus to define key product requirements. Compared to a traditional “requirements doc” approach, the Design Studio sessions drastically reduced the time, effort, and overhead of the project’s requirements-gathering phase.