The Crew Change module allows to store information about on-signers and off-signers at each crew change port, perform promotions, etc.
Together with Rotation Planning Module, it is a tool for updating and creating Activities.
To access Crew Change module, click 
icon on Modules ribbon or press Ctrl+Alt+C hotkeys.
To perform different operations here, you need to have certain access rights (Write/Read) set for every routine concerning Crew Change module in Adonis Control Centre:
From ver. 2018.3, We provided separate access rights routines for ribbon commands:
922 Create new Crew Change
929 Move Crew Change
942 Delete Crew Change
943 Cancel Crew Change
944 Change ETA/ETD
945 Set to History
The simplest workflow schema is shown below:
First you need to create a new crew change and define its main properties, like: a vessel name, a port, an arrival date and departure date (at Calling Ports tab).
Then you modify the crew change details: define who is going to sign on/off and when; who is going to relieve off-signers, etc. You can plan the crew change. It means that the corresponding planned activities will be created.
They are created automatically during a person is selected to Sign On/Off (at On-Signing, Off-Signing, Reliever, Promotion, Travel Info tabs).Confirm the crew change. After confirmation, the corresponding planned activities are changed to historical and you will not be able to modify any details for the people confirmed (On Signing, Off Signing, Promotion tabs).
Confirm travelling details. Corresponding travel activities will be created (Travel Info or Calling Ports tab).
After this, the crew change is considered as a fully confirmed and may be moved to Historical view.
You do not have to follow the main steps above strictly.