There’s two addons in the campaign factory screen called “QA Testing” and “Maintenance”, that I haven’t seen any playthroughs use yet. Are they just placeholders for now or is there a point to them?
They can’t be selected at the moment as they have not been implemented yet. That was one of the options available for the Lite Campaign V2, but most people wanted to see Engineering Familiarity implemented instead. 
It will become a thing in later versions.