# Availability

`Availabilities` define a specific time range during which an `Employee` is available to execute tasks.
These can either be derived from a `ShiftSchedule` (via the user interface) or created on an ad-hoc basis.

When an `Availability` is created or updated, it triggers a consolidation process that generates a snapshot of the corresponding `Employee` at that moment, referred to as an `AvailableEmployee`.
This snapshot accounts for relocations (managed through the user interface) and `Unavailabilities`, ensuring a single source of truth for the `Employee`'s status at that point in time.

Any modifications to this `AvailableEmployee` snapshot activate an algorithm that evaluates potential `ResourceCombinations` involving the `Employee`'s `Availability`.
During this evaluation, potential `TransportResources` are assessed.
If the heuristic identifies that a specific `ResourceCombination` would enhance the overall solution's fitness, it is either created or updated.