Method for building green tyres, comprising: providing a forming drum ; providing at least one feeding apparatus configured for feeding an elementary semifinished product ; associating an anthropomorphic robotized arm with said forming drum ; sending movement commands (MC) to said anthropomorphic robotized arm in order to move said forming drum in a working zone (WZ), said working zone (WZ) being defined at an outlet area (OUT) where said elementary semifinished product exits said feeding apparatus , said forming drum being moved in said working zone (WZ) while said feeding apparatus is feeding said elementary semifinished product , so that said elementary semifinished product is laid on said forming drum in coils arranged side by side or at least partially overlapping each other for making at least one component of a green tyre of a given tyre model; characterised in that , sending said movement commands (MC) to said anthropomorphic robotized arm comprises: determining target coordinates (TC), associated with said at least one component of said green tyre, for said anthropomorphic robotized arm in order to move said forming drum in said working zone (WZ); retrieving from a memory area (M) a correction function (CF) associated with said anthropomorphic robotized arm and said working zone (WZ); modifying said target coordinates (TC) by means of said correction function (CF), thereby obtaining processed coordinates (PC); using said processed coordinates (PC) for said movement commands (MC). providing a forming drum ; providing at least one feeding apparatus configured for feeding an elementary semifinished product ; associating an anthropomorphic robotized arm with said forming drum ; sending movement commands (MC) to said anthropomorphic robotized arm in order to move said forming drum in a working zone (WZ), said working zone (WZ) being defined at an outlet area (OUT) where said elementary semifinished product exits said feeding apparatus , said forming drum being moved in said working zone (WZ) while said feeding apparatus is feeding said elementary semifinished product , so that said elementary semifinished product is laid on said forming drum in coils arranged side by side or at least partially overlapping each other for making at least one component of a green tyre of a given tyre model; characterised in that , sending said movement commands (MC) to said anthropomorphic robotized arm comprises: determining target coordinates (TC), associated with said at least one component of said green tyre, for said anthropomorphic robotized arm in order to move said forming drum in said working zone (WZ); retrieving from a memory area (M) a correction function (CF) associated with said anthropomorphic robotized arm and said working zone (WZ); modifying said target coordinates (TC) by means of said correction function (CF), thereby obtaining processed coordinates (PC); using said processed coordinates (PC) for said movement commands (MC). determining target coordinates (TC), associated with said at least one component of said green tyre, for said anthropomorphic robotized arm in order to move said forming drum in said working zone (WZ); retrieving from a memory area (M) a correction function (CF) associated with said anthropomorphic robotized arm and said working zone (WZ); modifying said target coordinates (TC) by means of said correction function (CF), thereby obtaining processed coordinates (PC); using said processed coordinates (PC) for said movement commands (MC). <EOS>