Depending on the brief, design can be worked out in different concepts (3 or more) with explorations in form, materials, finishes, processes, assembly modes (whether pick and place or knock-down) etc. Concept can be presented in multiple views in photo-realistic renderings. Selected concept can be fine tuned for optimization, form improvement and as per manufacturing needs. Final deliverables can in 3D format files (IGES, STEP, Parasolid or whichever preferred).