First of all, I drew the proposal unit to make sure that the scale is applicable in plan and front view.
Next, I started to develop the model to a 3d form and bare in mind the user’s need.
Afterwards, I tried different combinations with different scenarios:
Therefor, this is the final result:
The chair and the rack:
The rack and the storage:
Being joined all together:
Movie shows how the parts were joined together:
Model Using 3D Printer:
Final Presentation cover slide: