Method for managing a database shared by a group of applications, related computer program and on-board system

A method for managing a database shared by a group of applications, the applications being implemented by one or several on-board systems, the database comprising a plurality of elements, each element comprising a value and a version number, each application comprising a replica of the database, the replicas being identical during the initialization of the method, the method comprising:

• a modification step comprising modifying the value of at least one element in the replica of the database of an application, called active application, of the group of applications;
• an incrementation step comprising incrementing the version number of said element in the replica of the database of the active application;
• a transmission step during which the active application transmits transmission data to the other applications of the group of applications, the transmission data comprising the element modified during the modification and incrementation steps, and an earlier version number of this modified element, the earlier version number being the version number of this element before the implementation of the modification and incrementation steps;
• and
• a synchronization step, during which at least one application of the group of applications other than the active application updates its replica of the database based on a comparison of the earlier version number with the version number of said element in this replica;
• wherein:
• the value of at least one element comprised in each replica of the database is a function of a plurality of value arguments,
• the one or several on-board systems is implemented in an aircraft,
• each value argument of the plurality of value arguments includes sensor data from at least one sensor, and
• each of the at least one sensor is configured to measure the sensor data associated with one or more of a situation of the aircraft, a first environment of the aircraft, or a second environment of another aircraft.