The basic screen shows the staff and in this instance dates have been generated using the Headings function.
Duties are allocated by double clicking the cell to produce the '#' marker. Speciific duties can be typed, 'Milk' has been used to show who is responsible for bringing the supplies.
Availability is shown by the Red (Not Available) or Yellow (May be) backgrounds.
Fair allocation of duties can be easily checked by using 'Views' to show Duty allocations - see next screen.