System for monitoring an individual within predetermined facilities in order to determine whether there is a need for setting an alert, the system comprising: a personal module to be worn by the monitored individual, the personal module comprising at least one motion sensor; at least one node module, with which the personal module is arranged to communicate; a storage means; and at least one processing device (210, 310, 160), arranged to: receive sensor data from the at least one motion sensor in the personal module; determine whether the received sensor data indicates a specific alert state among a plurality of predetermined alert states, the alert states comprising at least a FALL alert state, to be used if a probable fall has been detected for the monitored individual, and an OUT OF BED alert state, to be used if it has been detected that the monitored individual is getting out of bed; determine the distance between the personal module and the at least one node module; determine the location of the personal module within the facilities based at least on the determined distance together with information retrieved from the storage means regarding the layout of the facilities within which the monitoring of the individual takes place; and set an alert based at least on: whether the received sensor data indicates an alert state; whether the determined location fulfils a predetermined location condition, indicating whether the individual is located in a certain room, such as e.g. the bedroom; and whether at least one previously determined activity state for the monitored individual fulfils a predetermined state condition. a personal module to be worn by the monitored individual, the personal module comprising at least one motion sensor; at least one node module, with which the personal module is arranged to communicate; a storage means; and at least one processing device (210, 310, 160), arranged to: receive sensor data from the at least one motion sensor in the personal module; determine whether the received sensor data indicates a specific alert state among a plurality of predetermined alert states, the alert states comprising at least a FALL alert state, to be used if a probable fall has been detected for the monitored individual, and an OUT OF BED alert state, to be used if it has been detected that the monitored individual is getting out of bed; determine the distance between the personal module and the at least one node module; determine the location of the personal module within the facilities based at least on the determined distance together with information retrieved from the storage means regarding the layout of the facilities within which the monitoring of the individual takes place; and set an alert based at least on: whether the received sensor data indicates an alert state; whether the determined location fulfils a predetermined location condition, indicating whether the individual is located in a certain room, such as e.g. the bedroom; and whether at least one previously determined activity state for the monitored individual fulfils a predetermined state condition. receive sensor data from the at least one motion sensor in the personal module; determine whether the received sensor data indicates a specific alert state among a plurality of predetermined alert states, the alert states comprising at least a FALL alert state, to be used if a probable fall has been detected for the monitored individual, and an OUT OF BED alert state, to be used if it has been detected that the monitored individual is getting out of bed; determine the distance between the personal module and the at least one node module; determine the location of the personal module within the facilities based at least on the determined distance together with information retrieved from the storage means regarding the layout of the facilities within which the monitoring of the individual takes place; and set an alert based at least on: whether the received sensor data indicates an alert state; whether the determined location fulfils a predetermined location condition, indicating whether the individual is located in a certain room, such as e.g. the bedroom; and whether at least one previously determined activity state for the monitored individual fulfils a predetermined state condition. whether the received sensor data indicates an alert state; whether the determined location fulfils a predetermined location condition, indicating whether the individual is located in a certain room, such as e.g. the bedroom; and whether at least one previously determined activity state for the monitored individual fulfils a predetermined state condition.