This is assuming that the commander has trained the squad. If not, a penalty should be applied on the tactics skill.
Who does what?Each turn, a passive tactics check is made to determine whether subordinates are going to act according to doctrine (In practice, moved by the commander). If the Tactics check is failed, the NPCs are going to act on impulses that are randomly determined (using a Roll20 table).
The maximum movement is limited by the tactics' MoS and the Adjusted Move of the subordinates.