Before prototyping, provide equipment drawings, dimensions, mounting holes, cable and connector details, material specs, sealing design, orientation, and target test conditions. Battery enclosures also require module, BMS, weight, and thermal data; DIN rail enclosures need component layouts; heatsink enclosures require heat source and dissipation methods.

Before testing, verify that samples include actual doors, seals, connectors, screws, windows, and cables to match production configurations. If water jet, temperature, vibration, or corrosion testing is required, confirm the respective standards and test scopes.