Author：Alex Chen

For any new product, it goes through 3 stages (EVT/DVT/PVT) of development before mass production. Through the 3- stage verification, new products can be modified, improved, and the target of a smooth mass production can be achieved.

EVT: Engineering Verification Test

There are only the PCB samples in this phase. Engineers review each component spec. and circuit to make sure nothing is wrong or missed.

DVT: Design Verification Test

The mechanical housing is to be included in the 2nd stage. The assembly samples can be reviewed and verified if PCBA and all components are fitted well before tooling/mold building. System samples are required to verify the mechanical design and the function in this stage. Any design issue should be solved before going to the next stage.

PVT: Production Verification Test

In the 3rd stage, small volume of pilot run production is arranged before the for future mass production. Therefore, a certain amount of the product must be produced and all production lines must meet the SOP requirement.

During the above 3 verification stages, we have to make production stations, flow charts, and working SOPs. All of these are to eliminate any potential problem that may happen in the future mass production. Furthermore, they are to reduce manufacturing cost and ensure product quantity/on-time delivery to increase the yield rate.

While pilot run is being processed, production engineers review all technical documents, such as BOM, Gerber file, and SOP. If any deviation is found, it will be listed in DFM and reported to customers for further improvement. We are concerned about every new product. That’s why Pronology can win trusts from all of our customers.