Improves health, attack, defense, speed, production, storage and repairing of your units and buildings.
The Engineering Bay building allows you to permanently improve the stats of your buildings and units on each level.
New levels apply only to new buildings/units, anything built before the level advancement will keep its stats and you will need to run the job Repair/Upgrade Units (Starport) or Repair/Upgrade Buildings (Technology Center) to match your current levels.
The stats you can improve are:
Increase the speed of the mission closest to objective.
From the Engineering Bay you can also activate which doubles the speed of the mission closest to objective.
Once activated, Hyperspeed will find the closest mission to target (or the closest arriving to base) and reduce the time by half. So, for example, if a Mission is due in 2 hours, it will be due in 1 hour. You can activate Hyperspeed many times, so a mission can go from 4h to 2h, then to 1h, then to 30min, etc.
It takes 15min to activate Hyperspeed, so if a mission is due in 14min or less, you will waste the job.