Method for loading items to be sorted into a transport volume or for unloading items to be sorted from the transport volume, comprising the following steps for a loading procedure of the transport volume: a) telescopically adjusting a transport volume-side end of a telescopic conveyor into the transport volume in order to reach a suitable loading position; b) introducing the items to be sorted on the telescopic conveyor up to the transport volume-side end thereof; c) unloading the introduced items to be sorted into the transport volume; d) adapting the adjustment of the transport volume-side end of the telescopic conveyor as a function of the ongoing loading state in order to adapt the loading position; e) acquiring the adjusted position by way of a control unit; and f) determining the expected residual loading time remaining for the transport volume on the basis of the acquired adjusted position and, optionally, the time profile thereof, and/or comprising the following steps for an unloading procedure of the transport volume: g) positioning a transport volume-side end of a telescopic conveyor relative to the transport volume in order to reach a suitable unloading position; h) unloading the items to be sorted at the transport volume-side end of the telescopic conveyor; i) discharging the items to be sorted on the telescopic conveyor up to the end thereof opposite the transport volume; j) telescopically adjusting the transport volume-side end of the telescopic conveyor as a function of the ongoing unloading state in order to adapt the unloading position; k) acquiring the adjusted position by way of a control unit; and l) determining the expected residual unloading time remaining for the transport volume on the basis of the acquired adjusted position and, optionally, the time profile thereof. a) telescopically adjusting a transport volume-side end of a telescopic conveyor into the transport volume in order to reach a suitable loading position; b) introducing the items to be sorted on the telescopic conveyor up to the transport volume-side end thereof; c) unloading the introduced items to be sorted into the transport volume; d) adapting the adjustment of the transport volume-side end of the telescopic conveyor as a function of the ongoing loading state in order to adapt the loading position; e) acquiring the adjusted position by way of a control unit; and f) determining the expected residual loading time remaining for the transport volume on the basis of the acquired adjusted position and, optionally, the time profile thereof, and/or comprising the following steps for an unloading procedure of the transport volume: g) positioning a transport volume-side end of a telescopic conveyor relative to the transport volume in order to reach a suitable unloading position; h) unloading the items to be sorted at the transport volume-side end of the telescopic conveyor; i) discharging the items to be sorted on the telescopic conveyor up to the end thereof opposite the transport volume; j) telescopically adjusting the transport volume-side end of the telescopic conveyor as a function of the ongoing unloading state in order to adapt the unloading position; k) acquiring the adjusted position by way of a control unit; and l) determining the expected residual unloading time remaining for the transport volume on the basis of the acquired adjusted position and, optionally, the time profile thereof.