Shipbuilding Rate

"The number of build points produced by each Shipyard per year. This can be increased by the Shipbuilding bonus of the planetary governor." - Lorekeeper Walmsley

This has various stages that can be researched in order:
 * 560 BP
 * 750 BP
 * 1000 BP
 * 1300 BP
 * 1600 BP
 * 2100 BP