Delivery slots are used by transporters to have their customers choose a predefined delivery date and time (a slot).
Slots are generated for a number of weeks ahead and stored in param deliverySlots.
The definition to generate slots is in param deliverySlotsDef. It contains information like postcode areas, days of the week and number of slots available.
Besides a limited number of slots for a specific date and postcode area, their might also be a limitation on weight, loadmeters and volume, depending on the truck sizes used on that date.