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?

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3 Answers

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

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

—from SWTOR Crew Skills Diagram on Google Docs

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This site contains a useful list of the most efficient Crew Skill combinations for each class based on the companion skill bonuses:

CREW SKILLS

The following is a list of all the crew skills and their related Mission and Gathering counterparts:

Armormech - Scavenging - Underworld Trading
Armstech - Scavenging - Investigation
Artifice - Archaeology - Treasure Hunting
Biochem - Bioanalysis - Diplomacy
Cybertech - Scavenging - Underworld Trading
Synthweaving - Archaeology - Underworld Trading
Slicing - This Gathering skill is not associated with any Crafting skill

• Armormech and Armstech are speficially for non-Force users.
• Artifice and Synthweaving are specifically for Force users.
• Biochem and Cybertech can be useful to all players regardless of their use of the Force.

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SITH INQUISITOR

• Artifice - Archaeology - Treasure Hunting
• Synthweaving - Archaeology - Underworld Trading

SITH WARRIOR

• Cybertech - Scavenging - Underworld Trading Synthweaving
• Archaeology - Underworld Trading

BOUNTY HUNTER

• Armormech - Underworld Trading - Scavenging
• Cybertech - Underworld Trading - Scavenging

IMPERIAL AGENT

• Armstech - Scavenging - Investigation
• Biochem - Bioanalysis - Diplomacy

JEDI CONSULAR

• Synthweaving - Archaeology - Underworld Trading
• Cybertech - Scavenging - Underworld Trading

JEDI KNIGHT

• Synthweaving - Archaeology - Underworld Trading
• Artifice - Archaeology - Treasure Hunting

SMUGGLER

• Armormech - Underworld Trading - Scavenging
• Cybertech - Underworld Trading - Scavenging

TROOPER

• Armormech - Underworld Trading - Scavenging
• Armstech - Investigation - Scavenging
• Biochem - Bioanalysis - Diplomacy