Please check that all the following are done before manufacturing the PCB:
Electrical connections Check that all connections and all components are correctly connected in the layout and schematic.
Layer Check that all resistors and capacitors are placed on the correct layer. Remember that we are using a single layer PCB in this exercise, so all capacitors and resistors must be placed on the back side.
Size Print the PCB in scale 1:1 and measure using a ruler that the size is correct. If you have components available it is also a good idea to place the resistors and other components on the paper to see that the components will fit physically and that the footprints are correct.
Run checks Run the ERC and DRC check.
Print When everything is OK, print the layout in black and white and bring to the PCB lab.