19. The planning method according to claim 1 , wherein such step of selecting, on such at least one computational device, by such at least one human project planner, at least one time-dependent relationship between such at least two activities comprises the step of selecting, on such at least one computational device, such at least one time-dependent relationship between any first activity embedded node, intermediate of the start and finish nodes of such at least one first activity, and any of the following: a) at least one activity start node of at least one second activity; b) at least one activity finish node of such at least one second activity; c) at least one milestone deadline; and d) at least one second activity embedded node, intermediate of the start and finish nodes of such at least one second activity.
19. The planning method according to claim 1 , wherein such step of selecting, on such at least one computational device, by such at least one human project planner, at least one time-dependent relationship between such at least two activities comprises the step of selecting, on such at least one computational device, such at least one time-dependent relationship between any first activity embedded node, intermediate of the start and finish nodes of such at least one first activity, and any of the following: a) at least one activity start node of at least one second activity; b) at least one activity finish node of such at least one second activity; c) at least one milestone deadline; and d) at least one second activity embedded node, intermediate of the start and finish nodes of such at least one second activity. 21. The planning method according to claim 19 , wherein such at least one time-dependent relationship comprises “from such at least one first activity embedded node to such at least one second activity start node” relationship.