The present teachings relate a method 10 performed in an arrangement (100) comprising a first device (2) configured to handle data obtained by one or more sensor modules (S1, S2, . . . , Sn) and a second device (3) configured to provide information. The method 10 comprises: receiving (11), in the first device (2), one or 5 more variable values relating to one or more contexts (91, 92, . . . , 9n) of a system (1), the variable values being obtained by the one or more sensor modules (S1, S2, . . . , Sn); determining (12), in the first device (2), an activity index for one or more of the contexts (91, 92, . . . , 9n) based on the variable values; retrieving (13), in the second device (3), the activity index for a context (91, 92, . . . , 9n; and providing (14), by the 10 second device (3), information based on the retrieved activity index.