# Determine Service Availability

SystemFunction

In-Flight Entertainment System > In-Flight Entertainment System > System Analysis > System Functions > Root System Function > IFE System > Manage Passenger Services Lifecycle > Determine Service Availability

This function is responsible for computing the availability of passenger services based on the authorization scheme (airline business strategy) and the aircraft contraints.

## Incoming Functional Exchanges

Exchange | Source | Description | Allocated Exchange Items
--- | --- | --- | ---
Passenger Service Authorization Profile | Set Passenger Service Authorization |  |
IFE Operating Profile | Determine Operating Profiles |  |

## Outgoing Functional Exchanges

Exchange | Target | Description | Allocated Exchange Items
--- | --- | --- | ---
Service Availability | Handle Service Activation Requests |  |

## Modes and States

- Halted
- Ready
- Degraded
- Fully Operational

## Realizing Elements

- Determine Passenger Service Availability

## Diagrams displaying "Determine Service Availability"

- [ES] Start VOD Service
- [SDFB] [CTX] Manage Passenger Services Lifecycle
- [SFBD] All System Functions
- [SDFB] [BUILD] All Functions
- [SDFB] [CAPABILITY] Provide Video Entertainment Services
- [FS] Handle Cabin Decompression Event
- [FS] Determine Passenger Service Availability