For a custom OEM (Original Equipment Manufacturer) order of outdoor furniture, the responsibility for providing precise measurements and ergonomic specifications typically lies with the client or the client's design team. The OEM manufacturer acts as the production partner, translating the client's provided designs, technical drawings, and detailed specifications into the final physical product. The client is responsible for delivering comprehensive CAD files, dimensioned drawings, material specs, and ergonomic requirements based on their market research, target audience, and design vision. The manufacturer's expertise then ensures these parameters are feasible for production, suggests material or structural optimizations, and executes the build. Clear, detailed specifications from the client prevent misunderstandings and ensure the final furniture meets exact expectations for size, comfort, and function. Ultimately, successful custom OEM relies on collaborative communication, where the client defines the "what" and the manufacturer advises on the "how" of production.