Which crew skills complement each other?

I was wondering, which of the crew skills are complementary? Like mining and smelting in WoW, which gets the components for which?


Solution 1:

Here's a very handy diagram for how the crew skills relate to each other.

crew skills diagram

Solution 2:

Here's a graph that delineates gathering, crafting, and missions.

enter image description here

—from SWTOR Crew Skills Diagram on Google Docs