In FBO One, every order is in a specific 'state'. A new handling is usually 'Requested' and after it's confirmed to the client the state changes to 'Confirmed'. Then, after the aircraft arrives, the state changes to 'Arrived'.
The state of an order defines whether the order is visible in the front office or not, how it should be sorted on the planboard, what the color in the planboard should be among other things.
The change from one state to the next is a transition. Each transition can perform an extra action when necessary, along with changing the state of the order.