The period lines are separate planning calibrations for each individual usage period of the planning calibration.
You can find an overview of all fields of the planning calibration here: Fields
To have a better overview of the current planning parameters, a fact box is also available.
The corresponding inventory costs, related to the currently selected period, can be shown by clicking this action:
Transfer calculated values
During calculation, the median (if available) is used by default for calculated values in the planning calibration. You can override this by selecting a period and clicking “Transfer calculated values”.
For a graphical visualization of the usages, select the “Chart” function.
A new window opens with the usages belonging to the period. You can change the display flexibly by adjusting the field “Summary Usage”. The associated field from the planning calibration is used as the default value.