Order of operations for squaring a board. (In our shop. Different on the certification test, takes innto account initial cut.)

Get a board close to the size you need by chopping it.  (Chop Saw)  (I usually add an inch to final length.)

Plane to thickness. (Planer)

Joint 1 edge. (Jointer)

Rip to Width. (Table Saw)

Chop end Square.  (Chop Saw)

Chop to length.  (Chop Saw)

Plywood differences

Manufactured board so we don't need to run through the planer and we already have clean edges.

Chop or Rip to width.

Chop or Rip to Length

Add Dados as needed.

Notes:

Determine how to effectively use the material provided.  1x6 lumber is around 5-1/2" x 3/4".  (Minimize waste.)

If you have small boards, add the lengths together so that they can be run through the planer.  (Need at least 12" board.) 

Rabbets and Dados: Determine best time to cut these in.  Most of the time it is when the board is bigger so that we get a uniform dado or rabbet and we have a board that is easier to handle.