35. The planning method according to claim 30 , further comprising the steps of: a. calculating, by such at least one computational device at least one reverse float value relating to such at least one time-dependent relationship, wherein such calculation comprises RF j =min [RF i +H i,j ], for all “I”, where “I” denotes each and every predecessor activity of a plurality of such predecessor activities to at least one “J” activity and “H i,j ” denotes such at least one relationship float value relating to each and every such predecessor activity.
30. A planning method, relating to at least one project, comprising the steps of: a) identifying a plurality of activities relating to such at least one project, each activity of such plurality of activities having at least one initial estimated duration; b) selecting at least one time-scaled calendar to display on such at least one graphical user interface; c) positioning of at least one symbol representing each of at least two such activities on such at least one time-scaled calendar on such at least one graphical user interface; d) selecting at least one time-dependent relationship between such at least two activities; e) calculating, by such at least one computational device, at least one relationship float value relating to at least one time-dependent relationship, wherein the at least one relationship float value is calculated based on planned dates where such planned dates are selected by at least one human project planner.