Appearance control

Board surface
Finished aperture and attribute
Thickness
Trace width/spce
Soldermask and legend
Dimensions and related machining
Surface treatment

IPC-A-600G or customer-related technical indicators

Physical testing

Coating thickness and microsection
(Cu in holes,copper chickness,Tin,Gold,Nickel thickness,etc)
Thermal stress test
Solderability test
Voltage-resistance and Insulation test
Characteristic impedance test

IPC-TM-650 or IPC-6012
Or customer standard