Suggestions for avoiding errors in the analysis process

Joint column

Make sure you know which joints do which action(s).

Joint action column

Don't put down an action that doesn't occur at that joint.
Remember to analyze direction of action if there is movement at the joint.
If no movement occurs at the joint, the position is maintained.

Action of gravity column

Analyze gravity as a fulcrum/lever.
Gravity pulls directly down.

Type of contraction and muscle group column

Muscles always oppose gravity.
If gravity is winning, it is a lengthening contraction.
If the position is maintained, it is a static contraction.
If the muscles are winning, it is a shortening contraction.

Specific muscles column

Don't put down a muscle that doesn't cross the joint being analyzed.
Look at the demand of the movement to determine the most difficult action (especially important at the hip and shoulder/scapula).
If in doubt, "send all the cowboys" that perform the action(s).
Balance muscular actions that oppose the action being performed (especially at the ankle/tarsus/toes).