Precautions when proofing PCB board

all production stages of PCBA. You need to understand all the design constraints that apply to your design so that it can be put into production, and you need to ensure that everything you do is documented.
Your prototype may not require this level of precise design to test its functional concept, but to make it eventually transition to mass production, you should combine DFM and DFT requirements from the beginning. When you prepare to transition to full production, the worst thing is to be forced to completely redesign the circuit board to incorporate the missing DFM and DFT requirements. The best way to avoid this situation is to cooperate with the CM, and the engineer and the engineer will review your design and help solve any problems.

Document requirements for building PCB prototypes
In the same way you should plan the design requirements in advance so that the PCBA can be put into full production, you should also plan in advance when creating the prototype PCB manufacturing documentation. Documents created hastily may be unreadable or even incorrect, and require a complete redo to pass the design to high-volume manufacturers. However, if your documentation is good from the beginning, then you only need to focus on the changes brought about by the prototype test, which will save you time and effort.
Another important aspect of the prototype document is that it needs to be as complete as possible so that you can easily incorporate any necessary changes. When testing and building with prototypes, any hardware modifications that need to be added to the document. At this time, using incomplete or messy documents may cause great frustration
In addition, if the CM makes changes to the design so that it can be completed by manufacturing, the documentation also needs to be changed. A high-quality CM will work with you to process your documents to ensure that these changes are made. Finally, all changes need to be re-integrated with the main design database so that future design iterations can be carried out easily.
CM's engineering support can help you make PCB prototypes
When designing PCBs for prototyping, one of the biggest resources that can be used is CM. There are many pitfalls that can derail an otherwise unsuccessful prototype, and CM's engineering experience can help you bypass these problem areas.
For example, your CM should keep abreast of the latest component information. If the components used in your prototype have a history of issues due to availability, price, mechanical issues, or performance, then your CM should be able to resolve these issues with you.