1. maintenance should also consider functions on modular device in case of failure or damage can have a relatively independent modules that can be directly replaced, for easy maintenance to replace the losses in time and cost.
2. functional performance requirements to ensure that basic, relatively intact on the note module performance, will meet heat dissipation, leakage, and other requirements.
3. process module requires, more use that don't require special handling of materials, equipment and so on, avoiding special manufacture, Assembly, repairs, increasing the difficulty and cost.
4. economic requirements: process of the original shape, material, production method and bad economic pros and cons of the module are decisive factors.
5. appearance of module modeling requirements: today's product development to design modelling, beauty, human pursuit of higher and higher, so in addition to satisfy functional requirements, also fully taken care of the exterior styling needs