1. A planning method, relating to at least one project, comprising the steps of: a) providing at least one computational device having at least one graphical user interface manipulable graphically by at least one human project planner; b) identifying, by such least one human project planner, 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; c) selecting, on such at least one computational device, by such at least one human project planner, at least one time-scaled calendar to display on such at least one graphical user interface; d) positioning, by such at least one human project planner using such at least one computational device, 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; e) 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; f) calculating, by such at least one computational device, at least one relationship float value and at least one reverse float value relating to such at least one time-dependent relationship; and displaying, continuously, by such at least one computational device, such at least one relationship float value and such at least one reverse float value on such at least one time-scaled calendar on such at least one graphical user interface.
1. A planning method, relating to at least one project, comprising the steps of: a) providing at least one computational device having at least one graphical user interface manipulable graphically by at least one human project planner; b) identifying, by such least one human project planner, 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; c) selecting, on such at least one computational device, by such at least one human project planner, at least one time-scaled calendar to display on such at least one graphical user interface; d) positioning, by such at least one human project planner using such at least one computational device, 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; e) 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; f) calculating, by such at least one computational device, at least one relationship float value and at least one reverse float value relating to such at least one time-dependent relationship; and displaying, continuously, by such at least one computational device, such at least one relationship float value and such at least one reverse float value on such at least one time-scaled calendar on such at least one graphical user interface. 2. The planning method according to claim 1 further comprising the steps of: a) providing at least one relationship float value (H i,j ) calculation to calculate at least one relationship float value i) wherein such at least one relationship float value (H i,j ) calculation comprises H i,j =H j −H i ; where “H j ” denotes the connection date to at least one successor activity “J” of a plurality of such successor activities and “H i ” denotes the connection date from at least one predecessor activity “I” of a plurality of such predecessor activities; and b) displaying such at least one relationship float value, continuously, by such at least one computational device, on such at least one time-scaled calendar on such at least one graphical user interface.