JLS or oleg could answer this more fully.
Until then, when you find something like movement bonus for construction facilities in AIC, I recommend going to the data directory and searching Facility.txt. If you do, you will see for example that the mining type components all have the movement bonus ability.
I was first puzzled by ship components in Design Creation with the Ancient Ruins ability until I looked into components.txt
A lot of this is in proportions also, and it is a brilliant use of these meaningless abilities to make the AI better and more flexible.