Abstract: A method for determining a usability of a household appliance includes scanning operating information of the household appliance, determining stresses of different components of the household appliance on the basis of the operating information, and of determining the usability of the household appliance on the basis of the stresses determined and of predetermined stress functions for the components. Wherein a stress function maps a stress determined to a remaining stress capacity.

Abstract: A method incorporates a device into a LAN, wherein the device has a certificate which was derived from a device reference certificate. The method includes checking whether the certificate of the device matches at least one reference certificate, which is available at a first access point to a first LAN. The method furthermore contains the incorporation of the device into the first LAN when it is determined that the certificate of the device matches at least one reference certificate available at the first access point.

Abstract: An apparatus for controlling the access of a user device to an electrical appliance. The apparatus is configured to determine electrical appliance data relating to data communication of the electrical appliance and to determine user device data relating to data communication of the user device. Furthermore, the apparatus is configured to determine, based on the electrical appliance data and on the user device data, whether or not the electrical appliance and the user device are in a common local communication network. The apparatus allows the user device to access the electrical appliance if it is determined that the electrical appliance and the user device are present in a common local communication network.

Abstract: An operating apparatus for a household appliance includes first and second structure-borne sound sensors and a processing facility. The structure-borne sound sensors are configured to be applied to the surface of a predetermined body in a manner spaced apart from one another. The processing facility is configured to determine, on the basis of sensor values from the structure-borne sound sensors, a location on the surface of the body at which a pulse was introduced into the body; to determine that the location is situated in a predetermined section of the surface; and to determine a function of the household appliance that is associated with the section. A method for controlling a household appliance is also provided.

Abstract: A household appliance includes a treatment chamber closable by a door for treatment of items to be treated by a plurality of treatment processes, and a proximity detector designed to identify a presence of a person approaching the household appliance. The household appliance is designed to carry out an action in dependence on a state of a treatment process in progress, when identifying an approach of the person.

Abstract: A method for determining a usability of a household appliance includes scanning operating information of the household appliance, determining stresses of different components of the household appliance on the basis of the operating information, and of determining the usability of the household appliance on the basis of the stresses determined and of predetermined stress functions for the components. Wherein a stress function maps a stress determined to a remaining stress capacity.

Abstract: A method and a system for managing a building. An autonomously moving platform traverses the building. The building is scanned with a scanning facility attached to the platform. A three-dimensional free space in the building is determined based on the scan.