I don't quite know what you mean but I'll give you an example of what I think you mean, please correct me if and when I'm wrong.
You want to build ships in a predefined order and then repeat (e.g. build a Cobalt then two Gardas then another Cobalt, then two more Gardas, etc.). In sins, ships are built in the order you queue them so you can select one Cobalt then select two Gardas before repeating as much as you would like or until you run out of resources/supply.
Hopefully this helps more than it hinders.